﻿March, 1858.] 



ELLIOTT SOCIETY. 



281 



revolving line a little below it, leaving a raised space like a 

 crimped fillet, wrapped around the shell. Aperture about a sixth 

 the length of the shell, ovate with the posterior angle sharp. 



This shell is about one-fourth of an inch in length, and very 

 slender. It is found with the Chemnitzia interrupta, in the 

 Post Pleiocene, on the Wando River, but rare. 



It is readily distinguished from the C. interrupta by its more 

 delicate form, and the band upon the whorls/ 



I have not seen it recent. 



COLUMBELLA ORNATA. 

 Fossil. Post pleiocene , Wando River, So. Ca. 



Shell small, dirty white, ovate-conic; whorls, six or seven; 

 in mature specimens seven can be distinguished ; nearly flat, with 

 longitudinal ribs extending almost to the apex, revolving lines in- 

 terrupted at the ribs, except near the base, where the ribs become 

 obsolete, and the revolving lines are uninterrupted and more de- 

 cided than elsewhere. Suture distinct, with the revolving line 

 next below it more deeply impressed than the others. Aperture 

 nearly half the length of the shell, narrow, with a rather deep 

 sinus at its posterior angle, ending in a short canal in front. 

 Outer lip thickened and smooth on the outside, being free from the 

 ribs and lines of the whorls ; within, strongly toothed ; pillar 

 covered with smooth callus, the outer edge of which is elevated 

 and sharp. Length one-fifth inch. 



I have seen this species only as a Post Pleiocene fossil. 



COLUMBELLA SPIRANTHA. 

 Recent. Wando River, So. Ca. 



Shell small, ovate conic; smooth, except at the base, w T here 

 there are a few revolving lines; whorls seven, in mature speci- 

 mens; nearly flat, with the suture distinct; color brown, with a 

 series of irregular triangular spots, of a dull yellow. There is 

 considerable variation in the coloring, sometimes the general 

 color is of the dull yellow, with brown, waving lines, marking off 

 the whorls with the irregular spots. Aperture oval, about one- 

 third the length of the shell, with a slight recess at the posterior 

 angle, and a short canal in front; brown, with a few teeth w T ithin 

 the outer lip, and a smooth slight callus on the pillar. Length 

 about one-sixth inch. 



Animal white; proboscis half the length of the shell ; foot a 

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