OP THE PURBECZ FOEMATION. 353 



parison with living forms. He regretted the number of names which 

 had to be coined for the subgenera of Cypris. 



The Atjthor said that Dariuinella was a genus founded by Brady, 

 and he regretted if that author had been forestalled. It is difficult 

 at times to distinguish the ends in fossil Ostracoda, and it is not 

 always possible to distinguish between the dorsal and ventral sides ; 

 but in these Purbeck forms there is no doubt or difficulty. With 

 respect to Swindon, the study of these fossils seems to confirm the 

 views of the late Mr. Charles Moore and Prof. Morris. 



