CATALOGUE. 



' A letter is annexed to the name of each Shell, de- 

 moting its abundance or rarity, as follows : 



A Shell abundant; can always be furnished. 

 B More rare, but can occasionally be furnished. 

 C Rare ; can seldom be supplied. 



O Extremely rare, a few specimens only having been 

 found. 



1 Dentalium dentale Linn. C Stomachs of fish. 

 *S '2 entalis " C Maine. 



i/" 3 *Pectinaria Belgica Lam. A New York Bay. 

 4 ? Gould C Mass. Bay. 



y' 5 *Sabel l:\ria ? A New York Bay. 



r <> *Terebella conchilega Lam. A Staten Island N.Y. 

 7 Amphitrite ventilabrum Lam. B Mass. Bay. 



I/ 8 *Spirorbis nautiloides Lam. A New Bedford. 

 * !) * " spirillum " B Mass. Bay. 



10 " sinistrorsa Gould C " " 



y 11 *Serpula vermicularis Linn. A Mass. Bay. 



12 *Coronula diadema Lam. B Back of Whales. 



13 * " aperta " C South Carolina. 



r 14 *Balanus eburneus Gould A Mass. Bay. 



. 15 * " elongatu? " A " " 



1H " geniculatus Conrad C " " 



