356 ODOSTOMIA. 



0. CANALTCULATA, Phil. PI. 78, fig. 20. 



Shell with three series of granulations on the upper whorls, 

 six on the body-whorl; whorls flattened, suture deeply chan- 

 neled. Length, 2'5 mill. 



Mediterranean. 



0. intermedia, Brusina, is a synonym. This species scarcely 

 differs from the ipreceding. 



II. Species of East Coast of United States, and West Indies. 



0. IMPRESS!, Say. PL 78, figs. 33, 34. 



Thick, opaque; whorls 7, flat, with deep suture, body-whorl 

 with 15 revolving lines, the upper ones more distant, about four 

 lines on the next whorl, the number of lines diminishing on the 

 upper whorls ; tooth distinct. Length, 5 mill. 



New England to Florida. 



0. insculpta, DeKay, is a synonym. 



Var, GRANATINA, Dall. Fig. 34. 



Posterior ribs strongly nodulous. Cedar Keys, Fla. 



0. TRIFIDA, Totten. PI. 78, figs. 36, 37. 



Smooth, glossy; whorls 8, with about 6 impressed revolving 

 lines, the one above and two next below the suture wider and 

 more distinct, ten or twelve very minute lines at the base of the 

 body-whorl ; fold sharp, oblique ; color ivory or soiled white. 



Length, 5 mill. 



New England, New York. 



0. MARGINATA, Cailliaud (fig. 37), appears to be a specimen of 

 this shell, accidentally carried to French shores. 



0. PRODUCTA, C. B. Adams. PI. 78, fig. 43. 



Whorls 8, flatly convex, white, under a light brown epidermis, 

 smooth, columella flexuously plicate. Length, 5 mill. 



Massachusetts. 

 0. FUSCA, C. B. Adams. PL 78, fig. 41. 



Whorls 6, rather flat, suture strongly impressed, with an im- 

 pressed line below it, smooth, white under a shining brown 

 epidermis ; fold remote, occasionally double, and sometimes 

 obsolete. Length, 6 mill. 



New England to Florida. 



