168 CRETACEOUS PALEONTOLOGY. 



Porina quadrangularis G. & H. 

 Porina coronata (Reuss) ? 

 Lepralia asp era G. & H. 

 Mucronella muralis (G. & H.). 

 Mucronella typica (G. & H.). 

 Mucronella aspera Ulr. 

 Mucronella pumila (G. & H.). 



BRACHIOPODA. 



Cistella beec/wri Clark. 

 Platidia cretacea n. sp. 



PELECYPODA. 



Gryphaea sp. 



Gryphaeostrea vomer ( Mort. ) . 



Polorthus tibialis (Mort.) 



GASTROPODA. 



Pleurotrema solariformis Whitf. 



CRUSTACEA. 



Callianassa sp. 



In addition to the above species, the following are recorded 

 from this formation at Vincentown, but have not been collected 

 by the writer : 



ECHINODERMATA. 



Pentacrinus bryani Gabb. 

 Pentaceros asperulus Clark n. sp. 

 Salenia tumidula Clark. 

 Treinatopygus crucifer ( Mort. ) 

 Ananchytes ovdis Clark. 

 Hemiaster parastatus ( Mort. ) . 

 Hemiaster Stella (Mort.) 

 Hemiaster ungula (Mort.) 

 Linthia tumidula Clark. 



