ECHINODERMA TA—CRINOIDEA . 



553 



Fig. 1882. Glyptocrinus deca- 

 dactylus, side view. (After Meek, 

 Pal. Ohio. ) 



do ^ 



Fig. 1883. Glyptocrinus dfcadadylus, 2ind\ys\ 

 of calyx. (After Meek, Pal. Ohio.) 



LXIIL SiPHONOCRiNus S. A. Miller. 



Calyx large, oblong, extremely asymmetrical. Dorsal cup deeply 

 depressed interradially, giving to the calyx a strongly lobed out- 

 line. Tegmen usually as high as the dorsal cup, inflated pos- 

 teriorly from below the brachial zone to the summit, forming a 

 conspicuous helmet-shaped protuberance. IB 5. Costals two. 



Fig. 1884. Sipho fi oc nnus, &nzi\ys,\s o{ coXyy.. (After Weller.) 



Anus at end of a tube which is either erect and at the summit of 

 the tegmen or anterior and near the arm regions (Fig. 1884). 

 Siluric. 



