Identifier: treatiseonzoolo03lank (find matches)
Title: A treatise on zoology
Year: 1900 (1900s)
Authors: Lankester, E. Ray (Edwin Ray), Sir, 1847-1929 Bather, Francis Arthur, 1863-1934 Goodrich, Edwin S. (Edwin Stephen), 1868-1946
Subjects: Zoology
Publisher: London : A. & C. Black
Contributing Library: Robarts - University of Toronto
Digitizing Sponsor: University of Toronto

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8, the same of Balanocrimissuhteres. 9, the ^mne of Pentaciinus fossilis. 10, the same of Isocrinus asteria. (From Bather,after P. H. Carpenter, de Loriol, von Meyer, and original.) 2, 3, 7, 8, 9, and 10 are slightlyenlarged. The stem is least specialised in Balanocrinus^ most in Pentacrinus, inwhich it attained a length of 18 feet (Quenstedt thought 70). Family10. UiNTACRiNiDAE. Dendrocriuoidea in which the arms fork once onIBr.,, are long and pinnulate, with numerous syzygies, and are incor-porated in their proximal regions, together with proximal pinnules, inthe dorsal cup, by means of iBr, illBr, and interpinnulars ; there isno stem, but a centrale. Genus—Uintacrinus, Grinnell (1876), UpperCretaceous, N. America, Germany, and England (Fig. CIIL), has a rela-tively large flexible theca and long arms. It was free-swimming andpossibly pelagic. IBB usually obsolete. For detailed account, see Bather(1896). Family 11. Marsupitidae. Dendrocrinoidea (?) with pinnulate 184 THE CRINOIDEA
Text Appearing After Image:
Fi(!. CIl. Js^ncrinn^ (Viteriti. (From A.A(;assiz, after \\ II. Curptiiter.)Rather less than halfiiat. sizo. THh: CRINOIDEA 185 arms, sliort in proportion to cup, borne on a sharply defined radial facot,and forking on IP.r., (iurtliur brandling unknown); they are loosely

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