RANDOM NOTES ON NATURAL HISTORY. 



31 



mens off a stone no larger than my hand 

 Ij'ing nearly at high-water mark. It in- 

 habits Massachusetts Bay to Long Island 

 Sound. 



38. Odostomia trifida, Totten. 



This species was discovered on the Island 

 of Rhode Island by Colonel Totten, on 

 valves of scallop shells (Pecten irradians, 

 Lam.), and described by him in Am. Journ. 

 Sci., XXVI., 368, 1834, under the name of 

 Action trifida. It inhabits the same local- 

 ities as the preceding species, and is as 

 abundant in Rhode Island, if not more so. 

 It closely resembles bisuturalis, but is a 

 little more slender in appearance, being one- 

 fourth inch long by one-tenth wide. Its 

 apex is acute, color glossy white, whorls 

 eight in number, flat, separated by a sharp 

 depressed suture, with three revolving lines 

 below the suture and numerous fine lines on 

 the front of the body whorl ; the outer lip 

 showing on the sharp edge the impressed 

 lines ; otherwise it resembles in all respects 

 the above bisuturalis. 



39. Odostomia producta, Adams. 



iSyns. : 



Jaminia producta, Adams. 



Chemnitzia producta, 8timp, 



This species also inhabits the same local- 

 ities as the two preceding, but is not at all 

 common in Rhode Island. It is light brown 

 in color, with eight whorls, nearly flat. It 

 is more slender than either of the others, 

 being a little over one-fourth inch in length 

 by one-fifteenth in breadth ; the apex is 

 blunt, as if one or more whorls were re- 

 moved ; the surface is faintlv marked by 

 lines of growth ; aperture about one-fourth 

 the length of the shell, ovate, rounded in 

 front, columella flexuous. It also difljers 

 from the others in having no umbilicus. It 

 was discovered by Professor Adams, near 

 Fairhaven, in 1839, and described in Boi^t. 

 Journ. Nat. Hist., in., 322, 1840. 



40. Odostomia fusca, Adams. 

 Syns. : 



Pyramis fusca, Adams. 



Jaminia fusca, Adams. 



Chemnitzia fusca, Stimp. 



This species was discovered by Prof. C. 

 B. Adams, at New Bedford, clinging to 

 planks near low-water mark, and described 

 in Bost. Journ. Nat. Hist., ii., 282, 1839. It 



resembles the preceding, but differs in sev- 

 eral points. The apex is more obtuse than 

 in bisuturalis, it has one to three more 

 whorls, with a smooth surface and no re- 

 volving line under the suture ; the aperture 

 is broader and modified by a twist of the col- 

 umella ; the color is violet brown, glossy, 

 darker at the tip. It is quoted from Vine- 

 yard Sound to New Jersey. Quite rare iu 

 Rhode Island. Length one-fourth inch, 

 breadth three-fortieths. 



41. Odostomia dealbata, Stimpson. 



" Shell ovate-conic, white, smooth, pellu- 

 cid ; whorls six, rather convex ; aperture 

 ovate, hardly effuse ; furnished with a small 

 inconspicuous fold. Length -^jj inch, 

 breadth y"^. Dredged in Boston Harbor, 

 three fathoms, on a shelly bottom." (Stimp 

 son.) 



New Haven, Conn. (Perkins). " I have 

 never seen this species." 



42. Odostomia seminuda, Adams. 

 Syns. : 



Jaminia seminuda, Adams. 



Chemnitzia seminuda, Stimp. 



Turbonilla seminuda, H. & A. Adams. 



Shell acute-conic, white and glossy-, trans- 

 lucent ; whorls six or seven, the upper ones 

 and one-half the bod}' whorl covered with 

 numerous ribs or folds crossed by three re- 

 volving equidistant lines, making the sur- 

 face to appear covered with net work, while 

 the lower half of the body whorl has four 

 revolving lines, not reticulated ; outer lip 

 thin, scalloped by the lines. Length ^-(^g 

 inch, breadth ^^^. 



This species was discovered by Prof C. 



B. Adams, at Dartmouth, adhering to the 

 valves of scallop shells, and described in 

 Bost. Journ. Nat. Hist., ii., 280, 1839. 



Inhabits from Massachusetts Bay to 

 South Carolina. Common in Vineyard 

 Sound and Buzzards Bay, in 2 to 10 fath- 

 oms. (Verrill.) Greenport and Hunting- 

 ton, L. I. (S. Smith.) Fort Macon, N. 



C. (Coues.) Not ver}' common in Rhode 

 Island. 



The only other species which might pos- 

 sibly inhabit our shores is the Odostomia 

 impressa, Say, Journ. Ac. Sci., ii., 244, 

 1822, being quoted from Long Island Soun .1 

 to South Carolina. Say saw but two spe- 

 cimens, which he collected on the coast of 



Maryland. 



(To be contimiecl.) 



