PHRACTURA. 501 projecting but slightly beyond mouth; space between the two nostrils equally distant from end of snout and from eye; latter directed upwards, 6 to 7 ch in length of head, twice in interocular width ; sane barbel 4. length of head, outer mandibular 4, inner mandibular 4. Occipital process narrow, 4 times as long as broad, narrowly separated from interneural shield. Dorsal I 6 ; first ray longest, slightly longer Fig.373.
Phractura lindica.
Type (P. Z. 8. 1902).
than head ; second dorsal very small, originating above last rays of anal. Anal II 7-8. Pectoral a little longer than head, reaching or not quite reaching ventral; latter a little shorter, reaching anal. Caudal. with erescentic notch. Caudal peduncle depressed, 7 to 4 total length. 23-24 dorsal and 18-19 ventral scutes, of which 8-9 on caudal peduncle. Yellowish brown above, speckled with darker and with four more or less distinct broad dark cross-bands; fins whitish, with brown spots forming bars across the pectorals and ventrals. Total length 82 millim.
Lindi River, Upper Congo.—Type in Brussels Misecamn, 1. One of the types. Lindi Rh. ' M. M. Sian ©:
Brussels Museum (-P.).
902 SILURID.
3. PHRACTURA BREVICAUDA, sp. n.
Depth of body 6 to 74 times in total length, length of head 4 to 45 times. Head 14 to 12 times as long as broad, rugose above, covered with thin skin; snout 4 length of head, obtusely pointed, projecting but little beyond mouth; space between the two nostrils equally distant from end of snout and from eye; latter directed upwards, 6 to 7 times in length of head, 2 to 24 times in interocular width; maxillary barbel 3 to } length of head, mandibulars shorter. Occipital process about twice as long as broad, widely separated from interneural shield. Dorsal 165 first ray nearly as long as ora little longer than head ; second dorsal very small, originating above middle of anal. Aval II 7-8. Pectoral Fig.374.
Phractura brevicauda.
Type, Lobi R.
a little longer than head, not reaching ventral; latter reaching origin of anal or a little beyond. Caudal with crescentic notch. Caudal peduncle depressed, { to 2 total length. 23-26 dorsal and 18-19 ventral scutes, very small on body, larger on caudal peduncle (8 or 9 last), which is naked on the side. Brownish above, uniform or spotted or speckled with dark brown, or dark brown with three or four yellowish bars across the back; whitish beneath; usually a dark spot on dorsal fin and one on each lobe of caudal.
Total length 70 millim.
South Cameroon, Ogowe.
1-8. Types. Trib. of Lobi R., S.W.of Efulen, G. L. Bates, Esq. (C.). S. Camercon.
9. Skel.
10-11. Types. Kribi R., 3 12. Type. Abanga R., Ogowe. Dr. W. J. Ansorge (C.). ” bh) ”
PHRACTURA. 503 4, PHRACTURA INTERMEDTA, sp. n.
Depth of body 8 to 10 times in total length, length of head 5 to 5} times. Head 14 times as long as broad, rugose above, covered with thin skin; snout 4 length of head, obtusely pointed, projecting a little beyond mouth ; space between the two nostrils equally distant from end of snout and from eye ; latter directed upwards, 6 to 7 times in length of head, twice in interocular width ; maxillary barbel 4 length of head, mandibulars shorter. Occipital process 2 to 24 times as long as broad, widely separated from interneural shield. Dorsal I 6; first ray as long as or a little longer than head; second dorsal very small, above last rays of anal. Anal II 7-8. Pectoral as long as or a little longer than head, not reaching ventral; latter reaching origin of anal or a little Phractura intermedia.
Type.
beyond. Caudal with crescentic notch. Caudal peduncle depressed, 2 to 2 total length. Head and body often covered with wart-like tubercular papille. 24-26 dorsal and 17-19 ventral scutes, very narrow on the body, larger on caudal peduncle (11 or 12 last), which has a very narrow naked strip on the side. Brownish above, usually speckled with darker, and with three or four more or less regular dark bars across the back, one or two blackish bars on the dorsal and on the anal, and usually a blackish spot on the pectoral and on the ventral; usualiy a blackish blotch on each lobe of the caudal.
Total length 95 millim, South Cameroon.
1-10. Types. Ja Rt. at Bitye. G. L. Bates, Esq. (C.). 11. Skel. ‘, R 12-14. Types. Libi R., aff. of Ja R. = 15-17. Types. ' Kribi R. ‘ 18. Type. Nyong R. 0
504 SILURIDA.
5. PHRACTURA LONGICAUDA.
Bouleng. Ann. & Mag. N. H. (7) xii. 1903, p. 439. Depth of body 14 times in total length, length of head 6} times. Head 1} as long as broad, the slightly rugose skull covered with very thin skin; snout half length of head, pointed, projecting a little beyond mouth; space between the two nostrils at nearly equal distance from end of snout and from eye; eye supero-lateral, its diameter 53 times in length of head, 14 in interocular width; maxillary and outer mandibular barbels subequal, + length of head, inner mandibular 4; occipital Fig.376.
Phractura longicauda.
Type.
process about twice as long as broad, widely separated from the interneural shield. Dorsal I 6, first ray longest, spinulose, as long as head ; second dorsal very small, originating above last raysof anal. Anal II 6. Pectoral slightly longer than head, not reaching root of ventral. Caudal peduncle depressed, very slender, 2 total length. 25 dorsal and 19 ventral shields, of which 11 are on caudal peduncle, the last 4 united round the latter. Brownish above, speckled with dark brown, white beneath ; fins spotted with blackish.
Total length 77 millim.
South Cameroon.
1. Type. Mvile R. G. L. Bates, Hsq.'(C.).
6. PHRACTURA ANSORGII.
Bouleng. Proc. Zool. Soc. 1901, ii. p. 623, pl. xxxvii. fig. 1. Depth of body 10 times in total length, length of head 5 times. Head 13 times as long as broad, rugose above, covered with thin skin; a median 1idge on the snout, biturcating towards the interorbital region ;
PHRACTURA. 505 snout a little longer than postocular part of head, pointed, projecting beyond mouth; posterior nostril close to the eye; latter directed upwards, 7 times in length of head, 1% times in interocular width ; maxillary barbel } length of head, mandibulars shorter. Occipital process 23 times as long as broad, narrowly separated from interneural shield. Dorsal 16; first ray longest, as long as head; second dorsal -very small. Anal 110. Pectoral as long as head, nearly reaching ventral ; latter a little shorter, nearly reaching anal. Caudal with crescentic notch. Caudal peduncle a little depressed, + total length. 26 dorsal Fig.377.
Phractura ansorgi.
Type (P. Z. S. 1901).
and 22 ventral scutes, the last 11 on caudal peduncle. Pale brownish above, speckled with blackish, white beneath; two small blackish spots on the dorsal fin and two blackish streaks along the caudal. Total length 46 millim.
Lower Niger.
1. Type. Agberi. Dr. W. J. Ansorge (C.).
7. PHRACTURA SCAPHIRHYNCHURA.
Peliura scaphirhynchura, Pellegr. Bull. Mus. Paris, 1900, p. 6. Phractura seaphirhynchura, Bouleng. Ann. & Mag. N. H. (7) vi. 1900, p. 528, and Poiss. Bass. Congo, p. 335 (1901).
Depth of body 9 times in total length, length of head 5 times. Head 14 times as long as broad, rugose above, covered with thin skin; snout twice as long as postocular part of head, pointed, projecting a little beyond mouth ; space between nostril equally distant from end of snout and from eye; latter directed upwards, 7 times in length of head, 1}
506 SILURIDE.
times in interocular width; maxillary barbel 4+ length of head, mandibulars shorter still. Occipital process 24 times as long as broad, reaching interneural shield, but not forming a suture with it. Dorsal 16; first ray longest, as long as head; second dorsal very small. Anal17. Pectoral as long as head. Ventral as long as pectoral, extending a little beyond origin of anal. Caudal peduncle depressed, 4 total length. 22 dorsal and 18 ventral scutes. Brownish ; fins barred black and white.
Total length 120 millim.
Alima R., Upper Congo.—Type, in Paris Museum, examined. 36. PARAPHRACTURA.
Bouleng. Ann. Mus. Congo, Zool. ii. p. 47 (1902). As in the preceding, but lower jaw with a band of small conical tecth, interrupted at the symphysis.
Ubanghi.
1. PARAPHRACTURA TENUICAUDA.
Bouleng. t. c. p. 48, pl. xiv. fig. 2.
Depth of body 10 to 12 times in total length, length of head 5 to 5 Paraphractura tenuicauda, Type (A.M.C.). 4.
times. Head 12 to 1} times as long as broad, feebly rugose above, covered with thin skin; snout a little longer than postocular part of
PARAPHRACTURA.—TRACHYGLANIS. 507 head, pointed, projecting a little beyond the mouth ; space between the nostrils a little nearer eye than end of snout; eye directed upwards, 7 times in length of head, 14 to 1% times in interocular width ; maxillary barbel verrucose, 4 to 2 length of head, outer mandibular + to 4, inner mandibular } to +; occipital process very narrow, not reaching interneural shield. Dorsal I 6; first ray longest, as long as head ; second dorsal very small. Anal II 7. Pectoral as long as head, not reaching ventral; latter also as long as head, not quite reaching anal. Caudal with crescentic notch. Caudal peduncle depressed, about 3 total length. 24-26 dorsal and 18-20 ventral scutes, the last 6 united on caudal peduncle. Brown above, speckled or vermiculate with black, white beneath ; fins spotted with blackish. Total length 95 millim.
Ubanghi.—Types in Congo Museum, Tervueren.
1-2. Two of the types. Banzyville. Capt. Royaux (C.). 37. TRACHYGLANIS.
Bouleng. Ann. Mus. Congo, Zool. ii. p. 48 (1902).
Body elongate, feebly depressed, with extremely slender caudal peduncle; two series of rough, bicarinate bony scutes on each side, uniting on the caudal peduncle. ‘Two short dorsal fins, the first just in front of the ventrals and composed of a spine and 6 branched rays, the second very small and formed of thin rays preceded by a spine. Anal short. Pectoral with the outer ray spinous; ventral with 6 rays. No occipito-nuchal shield; a spine-like process of the eoracoid, under the base of the pectoral fin. Mouth small, inferior, with feebly developed lips; small conical teeth in both jaws; no vomerine teeth ; a maxillary and two mandibular barbels on each side. Nostrils rather close together ; eye small, without free border. Gill-openings broadly interrupted at the isthmus. Air-bladder much reduced. Ubanghi.
1, TRACHYGLANIS MINUTUS.
Bouleng. t. c. p. 49, pl. xiv. fig. 3.
Depth of body 10 to 11 times in total length, length of head 5 to 5} times. Head much depressed, 14 times as long as broad, rugose above, with finely denticulate ridges, two of which extend from the snout to the median occipital process, embracing two large cranial fontanelles ;
d08 SILURIDA.
three occipital processes, the median embracing the point of the interneural shield ; snout pointed, projecting strongly beyond the mouth ; eye 9 to 10 times in length of head, 3 to 33 times in interocular width. Maxillary barbel about 4 length of head, mandibulars 3. Coracoid and clavicle exposed, rugose. First dorsal 16; spine covered with asperities, a little shorter than head. -Anal 10 (first ray rudimentary). Pectoral spine similar to dorsal, but a little shorter, not reaching ventral; latter Fig.379.
Trachyglanis minutus.
Type (A. M.C.). x 2.
widely separated from ventral. Caudal peduncle a little depressed, about ¥ total length. Series of scutes beginning before origin of dorsal, uniting on caudal peduncle; 18-20 dorsal and 29-30 latero-ventral scutes, 9-10 last on caudal peduncle. Light brown above, darker on the head and sides, with broad dark bars; belly whitish. Total length 50 millim.
Ubanghi.—Types in Congo Museum, Tervueren.
1-2. Two of the types. Banzyville. Capt. Royaux (C.). 38. BELONOGLANIS.
Bouleng. Ann. Mus. Congo, Zool. ii. p. 50 (1902). As in the preceding, but bony scutes still more developed, not keeled, and forming a single series on the back behind the dorsal fin, first dorsal and pectoral rays thickened but not spinous, and mouth toothless, Ubanghi.,