Ozospongia johnstoni sp. nov. 

 (Page 185) 

 The branching colony on which the description of the genus and 

 species are based. . This appears to represent three individuals or 

 obcones derived from the same pedicel. All of the figures of this 

 species have been made from plaster replicas of natural molds m 

 the Chemung sandstone at Hinsdale, N. Y. 



[198] 



