ECHINODERMA TA—CRINOIDEA . 



515 



56. E. sacculus Hall. (Figs. 1833, 1834.) Devonic. 



Arms bifurcating several times, making eight or more divisions 

 at the extremities. 



Oriskany of Maryland. 



Fig. 1833. Edriocrinus sacculus ^ a FiG. 1834. Edriocrinus sacculus ^ base 

 nearly entire individual with arms. (Pal. with radials and first brachials attached. 

 N. Y.,III.) (Pal. N. Y., in.) 



Order III. CAMERATA Wachsmuth and Springer. 



XXV. CoccocRiNus Miiller. 



Like Platycrinus, but with wider costals which with the IR form 



a part of the dorsal cup ; the two costals succeeded by two distichals. 



Only one IR to each side. Orals 5, large and triangular, forming 



fi 



^ ^ 



Fig. 1835. Coccocrinus bacca : a, lat- FiG, 1836. Marsipocrinus, analysis of 

 eral, b, basal view. (After Roemer. ) calyx. (After Weller.) 

 (Specimens not so symmetrical as figures. ) 



nearly all the ventral surface, meeting in the center, but parted 

 toward the arm bases, leaving narrow slits. Siluric-Devonic. 



57. C. bacca Roemer. (Fig. 1835.) Siluric. 



Small. Orals unknown. 

 Niagaran of Tennessee. 



