Shells of New England. 51 



t 



Habitat. Bay Chaleiir, in the Gulf of St. Lawrence ; 

 taken from the stomachs of cod fishes {Morrhua Americana , 

 Storer,) by Mr. Foster, fisherman, in the summer of 1841, to 

 whom we are indebted for specimens. 



Remarks. This species is alUed to T. erosa, Couth., but is 

 easily recognized by the longitudinal ribs, and by its more 

 slender form. 



PLEUROTOMA VIOLACEA. 



Plate IV. Fig. 21. 



P. testa atro-purpureii, longitudinaliter sub-plicata, transverse striata ; anfrac- 

 tibus sex, ultimo supra carinato, plicis in medio evanescentibus, alteris medio 

 carjnatis; spira acuta; apertura angustata ; cauda brevi. 



Shell small, of a blackish purple color, ovate, with a pale 

 brown epidermis, irregularly sub-plicate, with numerous faint 

 revolving striae decussating by the incremental striae ; whorls 

 six ; whorls of the spire carinate in the middle ; last whorl 

 shouldered by a continuation of the same carina, with the 

 plications terminating on its convexity ; spire acute, conic ; 

 suture distinct ; aperture narrow, rather less than half the 

 length of the shell ; labrum simple, sharp, regularly curved, 

 with the sinus at the extremity ; canal short, wide. 



Length ,3 inch; breadth ,15 inch; divergence 40'-'. 



Cabinets of Bost. Soc. Nat. Hist., G. B. Sowerby, J. W. 

 Mighels, and C. B. Adams. 



Habitat. Casco Bay ; found without the animal, at low- 

 water mark, in the summer of 1840, and subsequently in the 

 stomachs of haddock. 



Remarks. This species is remotely allied to P. deciissata, 

 Couth. ; our shell, however, is always longer, aperture narrower, 

 and the sculpture less regular and distinct ; but it is especially 

 characterized by having the spiral carina far below the suture. 



FASCIOLARIA LIGATA. 



PI. IV. Fig. 17. 



F. testa elongata, fusiformi,cras8a, rubro-fusca, transversim costulata ; anfrac- 

 tibus sex, convexis : spird acuminata ; sutura valde impressa ; aperturii ovato- 

 elongata ; labro crenato : columella plicis duabus. 



S/iell elongated, fusiform, rather thick, of a reddish-brown 



