Pages 153–160, Text | Echini. Echinonëus and micropetalon, by A. M. Westergren

“ALBATBOSS' TROPICAL PACIFIC Ex. 1899-1900. EGHINONEUS. PLATE 29! AM Westergren del. B Meisel lith

PLATE 30.

MicropetalonpurpureumA.A Arrangementofthecoronalplates,seenfrominsideo Hawaiian Islands. a

“ALBATROSS” TROPICAL PACIFIC EX.

1899-1900. EGHINONEUS PLATE30. BiMeisel Jith.

A.M Westereren del.

PLATE31. 1-17. Micropetalon purpureum A. AGassiz and H. L. Cuarx. 1.—Interiorviewoftheactinalside. 2.—Analsystem,seenfromtheoutside. 3.—Stalkandheadofanophicephalouspedicellaria,measuring1.13mm.long,fromtheabactinal side, at the ambitus, from the right posterior interambulacrum. 4.—Ophicephalouspedicellariae,0.27mm.,valveBincentre,fromrightanteriorinterambulacrum from the abactinal side. 5.—ValveA,0.28mm.exteriorview. 6.—ValveB,0.26mm.exteriorview.|Ofasingleophicephalouspedicellaria,fromtheabactinalside 7.—ValveC,0.25mm.interiorview./attheambitus,fromrightanteriorinterambulacrum. 8.—ValveC,0.25mm.exteriorview,fromtherightanteriorinterambulacrum,fromtheabactinalside. 9.— Spine, 1.92 mm.

long, from right anterior interambulacrum, near the edge of the actinostome. 10.— Spine, 1.44 mm.

long, from right anterior interambulacrum towards the summit. 11.— Spine, 0.95 mm.

long, from odd anterior ambulacrum, at the edge of actinostome. 12.— Spine, 0.65 mm.

long, from right posterior interambulacrum, near the summit. 13.—Spine,0.81mm.long,detailofanend,fromrightanteriorinterambulacrum,fromtheabactinal side. 14.—Diskplate,0.21mm.indiameter,seenfromabove,fromoddanteriorambulacrum,fromthe actinal side. : 15.—Actinaltube-foot,0.50mm.long,seeninprofile,fromtheedgeofactinostome,inoddanterior ambulacrum. 16.—Abactinaltube-foot,diameterofthedisk0.11mm.fromtheapex.— 17.— Spicules from the tube. The magnification is identical in figures of the same order.

Historical text. Published in 1911. Scientific knowledge, names and medical understanding have changed since; this is a historical source, not current scientific or medical guidance. The text is taken from a digitised scan, so recognition errors from the scan may remain, and plates and figures are not reproduced.

Attribution. Westergren, A. M. (1911). Echini. Echinonëus and micropetalon, by A. M. Westergren. Digitised text released under CC0 1.0 via Zenodo (10.5281/zenodo.16697177). CC0 1.0. Original source ↗. Text extracted from the digitised PDF without changes to wording; page images, figures and plates are not reproduced. OCR errors in the source scan may remain.