WHITEAVE8. J FOSSILS OF HAMILTON FORMATION OF ONTARIO. 417 



Palaeoneilo plana, Hall. 

 Nyassa arguta, Hall. 

 Grammysia arcuata ? Conrad. Var. 

 Paracyclaa lirata (Conrad). 

 Orthonota parvula, Hall. 



GASTEROPODA. 



Platyceras carinatum, Hall. 



** dumosum, var. rarispinum. 



" erectum, Hall. 



" qiiinquesinuatum, Ulrich. 



Platyceras (Orthonychia) conicum, Hall. 

 Platyostoma lineatum, Conrad. 



** plicatuni, Whiteaves. 



" Shumardi. {= Turbo Shumardi, de Verneuil.) 



*' t'lrbinatum? Conrad. 



Pleurotomaria Arkonensi.s, Whiteaves. 



** capillaria, Hall. 



Euomphalus (Phanerotinua) laxus, Hall. 

 Loxonema. (Species undeterminable.) 



PTEROPODA. 



Tentaculites attenuatus, Hall. 

 Coleoprion (?) tenuis, Hall. 

 Hyolithes aclis, Hall. 



CEPHALOPODA. 



Orthoceras Anax, Billings. 



" Lanibtonense, Whiteaves. 



" subulaturn ? Hall, 



exile? Hall. 



" Arkonense, Whiteaves. 



Bactrites (obliqueseptatus ? var.) Arkonense, Whiteaves. 

 Goniatites uniangularis, Conrad. 

 Nephriticeras liratus, Hall. 



CRUSTACEA. 



OSTRACODA. 



Primitiopsis punctulifera (Hall). 

 Ulrichia Conradi, Jones. 

 Barychilina Walcotti, Jones. 



PHYLLOPODA. 



Elymocaris Hindei, Jones and Woodward. 



