16 



The operculum appears not to be fimbriated at its edges. 



This species has been taken from fishes caught off Lynn, 

 (Tufts,) also off Cape Ann ; and I have taken several from the 

 stomachs of haddock caught in about twenty fathoms, off Marsh- 

 field. 



TuREiTELLA AREOLATA, nob. n. s. T. parva, subperforata, 

 turrita, rubra, costis transversis, distantibus, quatuor, (duabus ad 

 anf. sup.) et plicis elevatis, interruptis, — areolata ; anf. 6, con- 

 vexi ; apertura antice effusa ; labro acuto. Long. .18; lat. 

 .09 poll. 



This is probably a young shell, but it appears distinct from 

 any of our species. It approaches T. reticulata, Migh., from 

 the Gulf of St. Lawrence, but the transverse ribs are more pro- 

 minent, and the longitudinal ones less so than in that shell. 



It was obtained from a fish caught off Cape Ann, in October,. 

 1850. 



Cerithium Greenii, Adams. A few dead specimens were 

 dredged in shallow water, in Charles River, near the Navy Yard. 



Chemnitzia modesta, nob. n. s. T. parva, conica, alba, 

 laevis ; anf. 4. planulati, ultimo medio subangulato ; sutura im- 

 pressa ; apertura uniplicata, subrhomboidea. Long. .14; lat. 

 .06 poll. 



This simple species much resembles C. hisuturalis, ( Turritella 

 hisuiuralis. Say, Odost. exigua (Couth.) Gould,) but wants 

 the revolving line just below the suture. 



It was found on stones drawn up by the fishermen from about 

 thirty fathoms, on St. George's Bank. 



Chemnitzia interrupta, nob. {Turritella interrupia, Tot- 

 ten, Gould.) Several specimens of this fine species have 

 occurred to me while dredging on sandy and muddy bottoms in 

 Boston Harbor, which differ from Southern specimens only in 

 being more ventricose. 



Chemnitzia seminuda, nob. (Odostomia seminuda, (Adams) 

 Gould.) The specimens of this shell, which I have taken in 

 Boston Harbor, are much larger than those noticed by Prof. 

 Adams and Dr. Gould, and do not agree well with their descrip- 



