FAMILY TURBINID.E — ODOSTOMIA. 115 



This small species was originally detected by Col. Totten, in the waters of Rhode-Island. 

 I have obtained them from Mr. Charles Wheatly, who dredged them from the mud in five 

 fathom water, opposite Staten island, and subsequently obtained them along the shore. They 

 are not uncommon on the northern shores of Long island. I have received specimens of an 

 Odostomia ? from Mr. Couthouy, which differs from the above in having more than one fold 

 on the columella. It will be described by Mr. Couthouy. \ 



Odostomia seminuda. 



PLATE VIII. FIG. 171. 



(STATE COLLECTION.) 



Jaminia seminuda, Adams, Bost. Jour. Nat. Hist. Vol. 2, p. 280, p). 4, fig. 13. 

 Odostomia seminuda, Gould, Invertebrata of Mass. p. 273, fig. 178. 



Description. Shell small, acute, conic. Whorls seven, convex : upper whorls and half of 

 the body-whorl longitudinally rugose, crossed by three equidistant revolving lines, presenting 

 a granulated appearance : at the base of the lower whorl are four revolving lines, beginning 

 on the middle, where the folds abruptly terminate. Suture distinct, divided by an indistinct 

 spiral ridge. Aperture oval ; the outer lip very thin, and scolloped by the revolving lines ; 

 the pillar-lip with an inconspicuous fold. 



Color. Glossy white, translucent. 



Length, 0-15. Width, 0-07. 



First observed by Prof. Adams on the coast of Massachusetts, and since dredged by Dr. 

 Stillman in the East river opposite Newtown creek. These latter specimens are larger than 

 those described by Messrs. Adams or Gould, having a total length of 0* 25, and width of 0" 1 . 



Odostomia insculpta. 



PLATE XXXI. FIG. 297. 



(STATE COLLECTION.) 



Description. Shell elevated, thick, opaque, regularly tapering to the apex. Whorls seven, 

 flat, with a deeply impressed suture : body-whorl with ten deeply sculptured closely approxi- 

 mated revolving striae on the lower half, and five distant revolving lines on the upper half ; 

 about four on the next whorl, and gradually diminishing in number above. Aperture ovate, 

 acute above, effuse beneath. Lip simple ; fold on the pillar-lip near the middle, distinct under 

 the lens, and deepening within. 



Color. Soiled white ; the sculptured lines rufous. 



Length, 0-2; of aperture, 0'08. 



15* 



