UTICA FORMATION. 

 Hydrozoa. 



Didymograptus annectans, Walcott sp. 



" flaccirlus, Hall. 



Diplogiaptus miicronatusi Hall. 



" pristisi Hisinger. 



putillus, Hall. 



" quadrimucronatu.s, Hall. 



Sagenella atnbigua, Walcott. 



POLYZOA. 



Stictopora acuta, Hall. 



Brachiopoda. 



Leptsena sericea, Sowerby. 

 Leptobolus insignis, Hall. 



" occidentalism, Hall. 



Lingula Daphne, Billings. 



" obtusa. Hall. 



'• Progne, Billings. 



" quadrata, Eichwald. 

 Orthis testudinaria, Dalman. 

 Schizocrania filosa, Hall. 

 Siphonotreta Scotica. Davidson. 

 Strophomena alternata, Conrad. 

 Zygospira Headi, Billings. 



Lamellibranchiata. 



Lyrodesma pulchellum, Hall. 

 Mo liolopsis modiolaris, Hall. 

 Oithodefima paralleluni. Hall. 

 Pierinea insueta, Conrad. 



" Trenton«nsis, Conrad. 



o, 



TEROPODA. 



Conularia Hudsonia, Emmons. 

 " Trentonensis, Hall. 



Gasteropoda. 



Bellerophon bilobatus, Sowerby 

 Murchisonia Milleri, Hall. 

 Pleurotomaria subconica, Hall. 

 Trocholites ammonius, Cofirad. 



I 



