Annelida, 



Serpulites dissolutus, Billu.^'s, or a very closely allied 

 species. 



Crustacea. 



Isotelns canalis, Conrad. 



Leperditia Canadensis var. nana, Jones. 



BIRD'S EYE AND BLACK RIVER FORMATION 



Protozoa. 



Receptaculites occidentalis, Salter. 

 Stromatocerium rugosum, Hall, 



Polypi. 



Coluinnaria Halli, Nicholson. 

 Streptelasma protuudnni, Hall. 

 Tetradium tibratum,, Safford. 



Brachiopoda. 



Rhyjichonella increbesv^ens, Hall. 

 Streptorhynchns filite ,:lum, Hall. 



Lamellibranchiata, 



Cyrtodonta subtruncata, Hall. 

 Gasteropoda. 



Pleurotomaria subconica, Hall. 

 Cephalopoda. 



Cyrtocerari falx, Billings. 



" sinuatum, Billings. 



" vagans, Billings, - 



Gonioceras anceps, Hall. 

 Oncoccras constrictum, Hall. 

 Orthoceras (Ormoceras) Bigsbyi, Stokes. 



" bilineatura, Hall. 



" decrescens, Billings. 



" rapax, Billings. 



Crustacea. 



Illsenus Conradi, Billings. 



" ovatus, Billings. 



" Trentonenais, Emmons. 

 Leperditia gracilis? Jones. 



