NAPLES FAUNA IN WESTERN NEW YORK, PART 2 349 



Professor Hall's characteristic hand, "Cyathocrinus ornatissimus." 

 This I think we may with propriety regard the type of the species. 



The specimen is remarkable specially for the structure of its pinnules 

 which are constituted of series of flattened keeled plates. I am indebted 

 to Mr Frank Springer for the following comments on the species : " Your 

 figure represents an extremely interesting and remarkable crinoid. The 

 arms are more ponderous than in any related generic form from the same 

 or equivalent formation. The long and closely packed pinnules with their 

 keeled elevations on the dorsal side, look very much like those of the 

 subcarboniferous Actinocrinidae. However they spring from cuneiform 

 brachials of uniserial arms, such as pertain generally to the earlier Inadu- 

 nata, to which division this crinoid belongs. From the characters exhibited 

 I think it may be safely assigned to the genus Scytalocrinus." 



