1869.] 121 [Perkins. 



Odostomia trifida Gould, Invert. Mass., p. 274, fig. 179; De 

 Kay, Moll. N. Y., p. 114, pi. viii, fig. 178. Actceon trifidus Totten, 

 Am. Journ. Sci., Vol. xxvi, p. 368, pi. i, fig. 4. 



This species is more common than any of the others. It occurs 

 under stones and among alga? near low water. The animal is very 

 similar to that of 0. bisuturalis. 



Turbonilla Eisso, 1826. 



Turbonilla illterrupta Stimps., Check List. Turritella inter- 

 rupta Totten, Am. Journ. Sci., Vol. xxviii, p. 352 ; Gould, Invert. 

 Mass., p. 268, fig. 173; De Kay, Moll. N. Y., p. 112, pi. vi, fig. 123. 



Kare. Occurs under stones at the Lighthouse and Savin Rock, 

 near low water. 



Turbonilla nivea Stimps., Check List. Chemnitzia nivea 

 Stimps., Proc. Bost. Soc. Nat. Hist., Vol. iv, p. 114, 1851. 



Only three or four dead specimens were found. 



PLEUKOTOMIim 

 Pleurotoma Lam., 1799. 



Pleurotoma cerinum Kurtz & Stimps., Proc. Bost. Soc. Nat. 

 Hist., Vol. iv, p. 115; Stimps., Shells of N. E., p. 49, pi. ii, fig. 2. 



Only four or five specimens of this species have been found — all of 

 them dead. 



Pleurotoma brunnea nobis. Pleurotoma plicata C. B. Adams, 

 Bost. Journ. Nat. Hist., Vol. in, p. 318, pi. iii, fig. 6; Gould, Invert. 

 Mass., p. 282, fig. 187; De Kay, Moll. N. Y., p. 150, pi. iv, fig. 120. 



I have found only one specimen of this shell ; this was in a pile of 

 shells thrown up by the waves. As Prof. Adams' name is preoccu- 

 pied by Lamarck (see An. sans Vert., 12th ed., Vol. ix, p. 371), I 

 propose that given above. 



TEREBRID^:. 



One rather worn specimen was found by Prof. Verrill, which I 

 refer to this genus. It seems to be new, but is not so perfect as to 

 warrant a description. 



