164 ' AURICULACEA. 



75, fig. 21) about the length of the shell ; tentacles short, 

 pointed, eyes at their interior base ; proboscis extending 

 beyond the head, bilobate, bluntly terminating ; posterior 

 termination of the foot short, bifid, color dark brown. 



Shell imperforate, cone-shaped, very solid and heavy, 

 smooth and shining in fresh specimens, with delicate 

 wrinkles of growth, and very numerous microscopic re- 

 volving lines ; light fawn-color when deprived of its russet 

 epidermis, with three or four revolving bands of white on 

 the body whorl, of which the uppermost is broadest; 

 suture moderate ; spire short, conic, apex black, shining, 

 pointed ; whorls from 9-10, the upper ones flattened, the 

 last obtusely angulated below the suture, \l the length of 

 the entire shell; aperture subvertical, long and narrow, 

 gradually widening towards the base of the shell, about \l 

 the entire length of the shell ; peristome acute, not re- 

 flected, but thickened within by a heavy white callus, 

 extending as high up as the carina of the body whorl ; on 

 this callus are from 15 to 22 white, transverse laminae or 

 ridges, not reaching the edge of the peristome, and not 

 entering far into the aperture ; sometimes there is a sec- 

 ond and even third series of these laminee visible' within 

 the aperture ; on the parietal wall are two elevated, white, 

 entering folds, the upper one much more prominent ; the 

 columella is covered with a shining, brown callosity, and 

 furnished with one rather prominent fold, which com- 

 mences at the termination of the peristome, and winds 

 upwards into the interior of the shell ; the interior whorls 

 and axis are entirely absorbed. 



Diameter of a large specimen, 10 ; length, 19 diameters. 



Geographical Distribution. The only specimens I have 

 seen were collected in Florida by Mr. Bartlett, more than 

 ten years ago. 



It is a well known and very common shell in the West 

 Indies. Referred also to Mexico by Pfeiffer. 



