A treatise on zoology . )lete circlet. The members of this sub-family live in colonies, butcan move about and anchor by the cirri at the distal end of the Fig. CI. Pentacrininae. 1, Pentacrimis fossil if, portion of stem, patina, and portion of arm, showingrami, ramuli, and pinnules (/)). 2, the same ; portion of a cirrus and articular facet of a , the correspondin;4 parts of Isocrimis asteria. 4, Mefacrinus Moseleyi, cup and proximal jjor-tion of an arm. 5, Isocriiins pciuhilns, cup seen from below, with portion of stem, bearing cirri,still attached toit, and with proximal brac
A treatise on zoology . )lete circlet. The members of this sub-family live in colonies, butcan move about and anchor by the cirri at the distal end of the Fig. CI. Pentacrininae. 1, Pentacrimis fossil if, portion of stem, patina, and portion of arm, showingrami, ramuli, and pinnules (/)). 2, the same ; portion of a cirrus and articular facet of a , the correspondin;4 parts of Isocrimis asteria. 4, Mefacrinus Moseleyi, cup and proximal jjor-tion of an arm. 5, Isocriiins pciuhilns, cup seen from below, with portion of stem, bearing cirri,still attached toit, and with proximal brachials. 6, a radius of the same, showing isotomy of , Isocrinus amhlyscalaris, jomt-suvtace of an internodal columnal. 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.,, ar
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
