GEPHY ROGLANIS.—PHYLLONEMUS. 349 times as long as deep. Brownish above, white beneath; a blackish spot behind the gill-cover, fins blackish at the end. Total length 140 millim.
Upper Congo.—Type in Congo Museum, Tervueren. Gephyroglanis longipinnis.
Type (A. M.C.). 4.
1. One of the types. Stanley Pool. M. P. Delhez (C.). 2. Hgr. Upper Congo. Brussels University. 18. PHYLLONEMUS.
Bouleng. Tr. Zool. Soc. xvii. 1906, p. 552. Like Chrysichthys, but without nasal barbel and with the maxillary barbel fringed on both sides by a leaf-like membrane in its distal part ; only vomerine teeth on the palate. A single species.
1. PHYLLONEMUS TYPUS.
Bouleng. |. ¢. pl. xxxii. fig. 3.
Depth of body 54 times in total length, length of head 33 times. Head smooth, 1} times as long as broad; occipital process very short, widely separated from dorsal; snout flat, broadly rounded, subtruncate, projecting very slightly beyond mouth; eye + length of head, equal to interorbital width; maxillary barhel 14 times as long as head, extending beyond extremity of pectoral ; outer mandibular barbel as long as head,
350 SILURID&.
twice as long as inner; vomerine teeth in a short transverse series. Dorsal I 6, a little nearer end of snout than root of caudal ; spine short and feeble; longest rays 3 length of head. Adipose dorsal a little shorter than its distance from the rayed dorsal. Anal 12, opposed to adipose dorsal, which is about 3 as long as its distance from rayed dorsal. Pectoral spine 4 length of head, strongly serrated on inner border, Ventral inserted a little behind vertical of dorsal, not reaching anal. Fig.271.
Phyllonemus typus.
Type (Tr. Z. 8S. 1906).
Caudal peduncle a little longer than deep. Caudal deeply notched. Brown above, white below; maxillary barbels blackish at the end; dorsal dark brown, adipose fin dark brown, white behind; caudal brown, each lobe tipped with white; anal white, dark brown at the base ; ventrals white.
Total length 73 millim.
Lake Tanganyika.
11 Type. Niamkolo. Dr. W. A. Cunnington (C.).
19. LEPTOGLANIS.
Bouleng. Ann. Mus. Congo, Zool. ii. p. 42 (1902). Body more or less elongate, feebly compressed. Dorsal and anal fins short, the former consisting of a spine and 5 branched rays; an adipose dorsal fin. Pectoral fin expanded horizontally, with a spine. Ventral fin with 6 rays, behind dorsal. ‘Three pairs of barbels: maxillary and two mandibulars. Nostrils widely separated from each other. Eye superior, without free border. Mouth small, with minute teeth ; palate toothless; maxillary much prolonged, movable, connected with the head by a membranous fold. Gill-membranes narrowly attached to isthmus. Air-bladder large, free.
Tropical Africa.
LEPTOGLANIS. 351 Two species :-— Head twice as long as broad; diameter of eye much greater than interorbital width ; pectoral reaching ventral, its spine slender, TO MOM gg! eM MGI Cleo Nie 1. L. xenognathus, Blgr., p. 351. Head slightly longer than broad; diameter of eye a little less than interorbital width ; pectoral not reaching ventral, its spine stout, strongly serrated. . . - . + | 2. L. rotundiceps, Hilg , p. 352. 1. LEPTOGLANIS XENOGNATHUS.
Bouleng. t. c. p. 43, pl. xiv. fig. 1. Depth of body 10 times in total length, length of head 43 times. Head much depressed, twice as long as broad; snout obtusely pointed, half length of head; eye 4 times in length of head, 3 times interocular width; posterior nostril nearer eye than end of snout ; Leptoglanis xenognathus.
Type (A.M.C.). 3.
maxillary extending to below anterior border of eye; maxillary barbel 2 length of head, mandibulars subequal, 4; a narrow occipital process, nearly reaching interneural plate. Dorsal 15, very near head; spine not serrated, 4 length of head, Adipose dorsal 4 times as long as deep, 24 times as long as rayed dorsal, a little shorter than its distance from
352 SILURID®.
latter. Anal III 5. Pectoral nearly as long as head, extending a little beyond root of ventral; spine slender, not serrated. Caudal rather deeply notched, lower lobe the longer. Caudal peduncle twice as long as deep. Brownish; fins whitish; two transverse series of brown spots on the dorsal and several oblique series of brown spots on the caudal. Total length 55 millim.
Ubanghi.—Type in Congo Museum, ‘Tervueren.
2. LEPTOGLANIS ROTUNDICEPS.
Gephyroglans rotundiceps, Hilgend. Zool. Jahrb., Syst. xxii. 1905, p. 412. Depth of body 5 times in total length, length of head 4 times. Head moderately depressed, slightly longer than broad; snout broadly rounded, half length of head; eye 4} to 5 times in length of head, a little less than interocular width; posterior nostril nearer eye than end of snout; maxillary extending to below posterior nostril ; maxillary Leptoglanis rotundiceps.
Type. x2.
barbel about 3 length of head, outer mandibular 3, inner mandibular 3; occipital process narrow, nearly reaching interneural plate. Dorsal I 4, very near head; spine not serrated, about % length of head. Adipose dorsal low, about 14 times as long as rayed dorsal, shorter than its distance from latter. Anal III 8-9. Pectoral nearly as long as head, not reaching ventral; spine stout, strongly serrated on inner side. Caudal feebly notched. Caudal peduncle twice as long as deep. Pale brownish above, with round darker spots.
Total length 37 millim.
Bubu River, Masailand.—Types in Berlin Museum.
1-5. Types. Bubu R, at Irangi. Prof, 0. Neumann (C.).
(Sh) (oy (ss) AMPHILIUS.
20. AMPHILIUS.
Pinuvlodus, part., Giinth. Cat. Fish. v. p. 114 (1864). Amphilius, Giinth. t. c. p. 115 ; Poche, Zool. Anz. 1902, pp. 121 & 212. Anoplopterus, Pfeff. Jahrb. Hamb. Wiss. Anst. vi. 2, 1889, p. 15, and Thierw. O.- Afr., Fische, p. 33 (1896) ; Bouleng. Ann. & Mag. N. H. (7) 1. 1898, p. 255, and Ann. Mus. Congo, Zool. ii. p. 41 (1902). Chimarrhoglanis, Vaill. Bull. Mus. Paris, 1897, p. 81. Body more or less elongate, more or less depressed anteriorly. Dorsal and anal fins short, the former consisting of a soft simple ray and 5 to 7 branched rays ; an adipose dorsal fin. Pectoral fin expanded horizontally, the outer ray more or less thickened but not ossified, formed of very numerous angularly bent articles, bearing an outer series or fringe of hairlike rays. Ventral fin with 6 rays, the outer of which is similar to the outer pectoral. ‘Three pairs of barbels: maxillary and two mandibulars. Nostrils widely separated from each other. Eye superior, without free border. Maxillary bone rather large, hidden in the lip but bordering the mouth ; jaws with a band of villiform teeth ; no teeth on the palate. Gill-membranes free, deeply notched. Air-bladder large, free. Vertebree 41 (19-20-+20-21). 8 or 9 branchiostegal rays. A more or less distinct foramen above the axil.
Tropical Africa.
Synopsis of the Species.
I. Dorsal entirely in advance of the ventrals, above the space between the latter and the pectorals.
A. Head not or but slightly longer than broad; snout broadly rounded, its length not more than twice interocular width; base of adipose dorsal at least nearly twice as long as that of rayed dorsal. 1. Length of head 5} times in total length. Maxillary barbel longer than head; caudal rane [p. 354. ae longer than deep. . . . . . IL. A. uranoscopus, Pteft., . Length of head 4 to 42 times in total length. Petit barbel shorter than fetal length of snout 1% to 2 times interocular width; caudal peduncle not longer than deep. . . . . . 2. A. grandis, Blgr., p. 355. Maxillary barbel as long as head; length of snout 1; times interocular width ; caudal peduncle not longer than deep. . . . . 3. A. krefiii, Blgr., p. 356. Maxillary barbel a little shorter wie Hen beth of snout 1} to 14 times interocular width; [p. 857. caudal peduncle longer than deep. . . . . -4. A. platychir, Gthr., -VOL. Il. oh oo er Sy ay, ; : 2 A
354 SILURID®.
Maxillary barbel longer than head ; iength of snout 13 times interocular width ; caudal peduncle not longer than deep. . .. . . d. A. hargeri, Blgr., p. 358. B. Head longer than broad ; te sbingely pointed, its length 2 (young) to 3 times interocular width ; base of adipose dorsal [p- 359. not more than 14 times that of rayed dorsal. 6. A. longirostris, Blgr., II. Dorsal entirely or partly above the ventrais. A. Head but slightly longer than broad ; snout broadly rounded ; interocular width 23-3 times diameter of eye.
Length of head 4—43 times in total length ; caudal peduncle a little longer than deep; caudal [p. 360. forked, with rounded lobes. . . . . . . 7. A. atesuensis, Blgr., Length of head 33-33 times in total length ; caudal peduncle as long as deep ; caudal Girt emargimate ... . . 8. A. brevis, Blgr., p. 361. B. Head much ee Bite rh baal snout obtusely pointed ; interocular width less [p. 362. than diameter ofeye . 2. . 2. . » « % A. angustefrons, Blgr., 1. AMPHILIUS URANOSCOPUS.
Anoplopterus uranoscopus, Pfeff. Jahrb. Hamb. Wiss. Anst. vi. 2, 1889, p. 16, x. 2, 1893, p. 33, pl. ii. figs. 1 & 2, and Thierw. O.-Afr., Fische, p. 33 (1896). Amphilius uranoscopus, Bouleng. Proc. Zool. Soc. 1905, i. p. 64. Amphilius uranoscopus.
Type, after Pfeffer (Jahrb. Hamb. Wiss. Anst. 1893), 4. Depth of body 6 times in total length, length of head 53 times. Head much depressed, a little longer than broad ; snout broadly rounded, nearly 4 length of head; eye very small, about 12 times iu length of head and 5 times in interocular width ;
AMPHILIUS. 555 posterior nostril midway between eye and end of snout ; maxillary barbel longer than head, reaching to midway between head and origin of dorsal, outer mandibular a little shorter than head. Dorsal I 6, much nearer end of snout than root of caudal. Adipose dorsal low, nearly twice as long as rayed dorsal, about half as long as its distance from latter. Anal IL5. Pectoral slightly longer than head. Ventral nearly as long as pectoral, far behind base of dorsal. Caudal feebly emarginate. Caudal peduncle as long as deep. Brown, upper parts clouded with darker.
Total length 150 millim.
Ushonda and Mhonda, Upper ranges of Wami River, German East Africa.—Types in Hamburg Museum.
2. AMPHILIUS GRANDIS.
Bouleng. Proc. Zool. Soc. 1905, i. p. 63, pl. vii. fig. 3. Amphilius leroyt (non Vaill.), Pellegre Mém. Soc. Zool. France, xvii. 1905, p-177.
Pimelodus (Amphilius) uranoscopus, part., Hilgend. Zool. Jahrb., Syst. xxii. 1905, p-411.
Depth of body 5} to 63 times in total length, length of head 4 to 42 times. Head much spe not or but slightly longer than broad ; snout broadly rounded, § or a little more than } length of head; eye very small, 9 to 15 ie in length of head, 24 to 34 times in futeroonle width; posterior nostril midway between eye and end of snout ; maxillary barbel } . 2 length of head, reaching or nearly So reaching root of pectoral; outer mandi- Zi bular barbel 5 to 2 length of head, inner about 4. Gill-rakers moderately long, 7 or 8 on lower part of anterior arch. Amphilius grandis.
Type (P.Z.8. 1905). 3.
396 SILURIDZ.
Dorsal I 6, mucn nearer end of snout than root of caudal. Adipose dorsal low, 2 to 24 times as long as rayed dorsal, its length 3 to 3 its distance from latter. Anal III 6-7. Pectoral % to $ length of head. Ventral a little shorter than pectoral, far behind base of dorsal. Caudal feebly emarginate. Caudal peduncle as long as deep. Olive-brown above, uniform or spotted or marbled with darker; fins uniform or dotted with blackish.
Total length 210 millim.
East Africa (Tana to Athi River Systems). 1-3. Types. Chania R. of Tetse, Tana System, 8. L. Hinde, Esq. (P.). 7000ft.
4-9. Ad. &hgr. Nero-Narok System, 4000-5000 ft. 3 10. Skel. Bs a 11-12. Her. Kibosho, Kilimanjaro. Prof. O. Neumann (C.). 13. Ad. Nairobi R., Prov. Kikuyu, Athi M. ©. Alluaud (C.) ; System. Paris Museum (.).
14-16. Ad. &her. Nairobi R., 3500 ft. A. Blayney Percival, Esq. (P.).
3. AMPHILIUS KREFFTIL sp. n.
Depth of body 63 times in total length, length of head 4} times. Head much depressed, as long as broad; snout broadly rounded, nearly Fig.276.
L enn C3 Suceas Amphilius krefftii.
Type.
+ length of head ; eye very small, 8 to 9 times in length of head, 2 to 24 times in interocular width ; posterior nostril a little nearer eye than end of snout; maxillary barbel as long as head, reaching a little beyond