14-2 



K< ' H ! X< > I > K 1 ! M ATA PELMATOZOA 



SUB-KINGDOM III 



highly elevated. Arms heavy ; branching in the free state. Anus borne at 



FIG. :>43. 



A, Actlnwriniix y /;W,M /<////.<, Hall. Hub-Carboniferous; Burlington, Iowa. Calyx with fractured tegmen, 

 showing the subtegininal anibulacral skeleton, and the convoluted digestive organ. K, Diagram of Dorycrinvs. 

 C, Natural cast of tegmen of Physetocrinus, with impressions of food-grooves (a), conducting from the arms to 

 the mouth (o) ; an, Anus. D, Enlarged portion of the anibulacral skeleton (after Meek and Worthen). 



the end of a short, stout, spinous tube. Lower Sub-Carboniferous ; North 

 America and Europe. 



Teleiocrinus, W. and Sp. Arms closely crowded, and forming a broad con- 

 tinuous flanging rim around the calyx. Anus at the 

 upper end of a long tube. Upper Burlington Limestone. 

 Steganocrinus, Meek and Worth. Burlington Lime- 

 stone. 



Physetocrinus, M. and "W". Arms crowded ; the arm- 

 bases projecting in a rim, which is interrupted along the 

 interrays. Anus in the form of a circular opening 

 through the tegmen. Lower Sub-Carboniferous ; North 

 America, England, and Belgium. 



Strotocrinus, M. and "VV. Arms crowded ; the upper 

 part of the dorsal cup produced in an immense rim, 

 which is horizontally directed, and is composed of higher 

 orders of brachials. Tegmen flat ; composed of innumer- 

 able minute pieces. Anus in the form of an opening 

 through the tegmen. Restricted to the Upper Burlington 

 Limestone. 



(SECTION B.) BATOCRINIDAE. 



Batocrinus, Gassed. (Fig. 244). Similar in form to 

 Actinocrinus, but calyx plates without sculpturing. 

 R hexagonal or heptagonal. First costals quadrangular, 

 always shorter than the Pi, and transversely arranged. 

 IRA ^ the same size as the 11 Interradials rarely more 

 t * uul tnree > an( * arched over by the palmars and higher 

 bnichials, when these are present in the calyx, so as to 

 be completely shut off from the plates of the tegmen. Tegmen elevated ; its 



