20 CATALOGUE OF THE 



Pleurotomaria ambigua, Hall. 

 Pleurotomaria calphurnia (?) Billings. 

 Pleurotomaria carinata, James. 

 Pleurotomaria dryope, Billings. 

 Pleurotomaria halli, S. A. Miller. 

 Pleurotomaria lenticularis, Sowerby. 

 — ^Pleurotomaria ohioensis, James. 

 ^Pleurotomaria subconiea, Hall. 

 Pleurotomaria subtilstriata, Hall. 

 Pleurotomaria tropidophora. Meek. 

 Pleurotomaria umbilieata, Hall. 

 *^ *Ilaphistoma lenticulare, Conrad. 

 Raphistoma planispira. Hall. 

 Raphistoma planistria. Hall. 

 Raphistoma staminium, Dennis. 

 Subulites acceptus, Ulrlcli.§ 

 *Trochonema umbilicatum, Hall. 



Class PTEROPODA. 



Conularia formosa, Miller & Dyer. 

 Conularia quadrata, Walcott. 

 Conularia trentonensis, Hall. 

 Hyolithes americanus, Billings. 



Class CEPHALOPODA. 



Cyrtoceras amoenum, S. A. Miller. 

 Cyrtoceras conoidale, Wetherby. 

 Cyrtoceras irregulare, Wetherby. 

 Cyrtoceras magister, S. A. Miller. 

 Cyrtoceras ventricosum, S. A. Miller. 

 Cyrtoceras vallandighami, S. A. Miller. 

 Endoceras annulatum, Hall. 

 Endoceras approximatum, Hall. 

 *Endoceras magniventrum, Hall. 

 </■ *Endoceras protei forme, Hall. 



Endoceras proteiforme, var. strangulatum, Hall. 



