474 Annals of the Carnegie Museum. 



spine-like cusps of the laminae, belong here. Clessin included under 



Fossarina all Pisidia except Fluminina and Rivulina, as understood 



by him — an aggregation of very heterogeneous forms. 



Nos. 1 12-129 of the preceding catalog are western Pisidia, the 



afifinities of which are not evident at the present time. No. 131 



appears to belong to a group represented by Central American and 



West Indian Pisidia. 



