64 



Cincinyiati Society of Nalural History 



work with rectangular interspaces, the narrow bands being 

 formed of thread-like spiculse resting on, or one against the 

 other. The spiculse differ in size ; some are filiform, while 

 others are stronger and more prominent." The species de- 

 scribed by I^lr. Walcott are from the Utica, State of New York. 

 That described below as a new species is from rocks of Cincin- 

 nati group age. 



C. .siLUKiAX.v, n. sp. 



iMKure ^. — Cyalhiiphyciis siluiiaiia, ii. sp. a, type speciiiK-n sliowiiijj tlie net work 

 formed by cross and periiendicular or ol)li([uc lints; /> and c two other specimens 

 not so weU preserved. 



Rounded or flattened cylindrical bodies, varying from one 

 to two and (jue-half inches in length, and about one inch in 

 width ; outer surface marked by longitudinal lines starting 

 from a common point at one end, and radiating in the form of 

 a cup ; numerous transver.se lines crcssing the longitudinal 

 ones and so forming an irregular net work. The internal 

 structure seems to be entirely lacking, the center being filled 

 with clav, and oiiIn- a jK^rtion t)f the framework remains. 



