64 



ECHINODERMATA. 



origins beneath by large shield-shaped plates : 

 cirri (or flexible threads between the ray-spines) 

 simple. 



94 



95 



9G 



0. texturata. 



albicla. Fig. 94 ; n. s. 



OjpMocoma (Agassiz). Rays simple, scaly, not 

 prolonged into the disk above; and separated at 

 their origins beneath by small five-sided plates: 

 cirri pinnate. 



0. neglecta. 

 punctata. 



0. bellis. 

 brachiata. 

 parmularia. 



0. filiformis. 



* * 



0. Ballii. 

 Goodsiri. 



