NORTH AMERICAN CONCHOLOGY. 



217 



Shuttleworth. — Description de Nouvelles especes : par R. 

 J, Shuttleworth. (From same as last, p. 169.) 



Page. Name. Locality. 



172 Cardium Egmontianum. Egmont Key. 



173 Conradi. Tampa Bay. 



Cardita incrassata Cour. ? non Sowb. 



Fischer. — Observations anatomiques sur des Mollusques pea 

 connus : par P. Fischer. (From Journal de Conchyliologie, 

 2d series, vol. i, p. 225. Jan. 1857.) 



Page. Name. 



235 Fissurella alternata Say. 



Fischer. — Etude sur un groupe de Coquilles de la famille des 

 Trochidae : par P. Fischer. (From same as last, vol. ii, p. 

 168. Oct. 1857.) 



[No descriptions are given. — "W. G. B.] . 



Page. Name. Locality. 



170 Skenea planorbis Flem. Greenland, &c. 



Turbo planorbis Fabr. 

 Helix flepressa Mont. 



171 Qouldii Phil. Massachusetts. 



Delphinula serpuloides Gould. 

 171 Molleri Phil. Greenland. 



171 costulata F. ^ H. Greenland, &c. 



Margarita costulata Hanley. 

 171 laxa Say. North America. 



Delphinula laxa Say. 

 171 Adeorbis Verrauxii Fischer. California. 



284 Vitrinella decussata Carp. Mazatlan. 



284 monile Carp. 



284 monilifera. 



284 lirulata. 



284 Bubquadrata. 



284 bifilata. 

 28.5 bifrontia. 

 28.5 coronata. 



285 annulata. 

 285 cincta. 

 285 carinulata. 



