A treatise on zoology . UBf. Fig. XL. Cylicocrinus nodosns, to exemplify the simplesttype of Camerate tegmen. 1, from 1. post, radius;2, from above. Ay, anus ; B, basals ; hr, openingfor food-groove and underlying canals; ib, largeinterbrachials (suborals, Jacikel). Other letters asusual. (After Joh. .Aluller, lS5o.) x 2. Fig. XLI. Tegmen of (Ussoerinns arfhriticiis,showing ambulacrals (--(j»6) passingdown arms and over apposed orals(0),and becoming enlarged over peri-stome. Post. O remains as a foldedmadreporite; t, anal tube. Otherletters as usual. (From Brit. ) X 3. Actinocrinidae
A treatise on zoology . UBf. Fig. XL. Cylicocrinus nodosns, to exemplify the simplesttype of Camerate tegmen. 1, from 1. post, radius;2, from above. Ay, anus ; B, basals ; hr, openingfor food-groove and underlying canals; ib, largeinterbrachials (suborals, Jacikel). Other letters asusual. (After Joh. .Aluller, lS5o.) x 2. Fig. XLI. Tegmen of (Ussoerinns arfhriticiis,showing ambulacrals (--(j»6) passingdown arms and over apposed orals(0),and becoming enlarged over peri-stome. Post. O remains as a foldedmadreporite; t, anal tube. Otherletters as usual. (From Brit. ) X 3. Actinocrinidae). These two facts suggest that the proximal dome-plates of Camerata, regarded as orals by Wachsmuth Sc Springer,and so quoted under head (3), may after all be modified ambulacrals. 126 THE CRINOIDEA
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