A. E. Verrill — Mollusca of the N'ew Migland Coast. 201 



Ganeza, sp. 



A single specimen, referred to tliis genus, was found adhering to a 

 Gorgnia, taken by the Blake, off George's Bank, in 980 fathoms, in 

 1880. 



The shell is small, white, smooth and glossy ; the spire is moder- 

 ately elevated and somewhat obtuse at the apex. AVhorls four, very 

 convex, with a deeply impressed suture. ' The nuclear whorl is 

 small, regularly coiled, and not prominent. The base is somewhat 

 produced and well rounded. There is no umbilicus, but its position 

 is marked by a small depression, or slight groove. The aperture is 

 regularly rounded, except on the side next the body-whorl and um- 

 bilical margin, where it is somewhat flattened ; the lip is indicated 

 on this side by a closely adherent and thin layer of enamel, which 

 appears to be continuous. Sculpture none, except very fine and 

 indistinct lines of gi'owth. 



Length, 2-5'^"' ; breadth, nearly 3'""\ 



This form might be, with equal propriety, referred to Cydostrema. 

 The distinctions between the latter and Ganeza and Tharsis seem to 

 me trivial, and no more than specific characters, at most. 



Tharsis, sp. 



Shell small, white, smooth and lustrous, composed of about three 

 and one-half whorls, which increase very rapidly, the last whorl 

 forming a very large part of the shell. The spire is moderately 

 elevated and the whorls evenly convex, with an impressed suture. 

 The base is considerably produced and convex, and the aperture is 

 oblique. The umbilicus is represented by a small and narrow chink, 

 behind the pillar-lip. Sculpture none, though a faint internal subsu- 

 tural line is visible, and there are traces of microscopic lines of 

 growth. Aperture broad-ovate, somewhat nan-owed and angulated 

 posteriorly, broadly rounded on the outer side, and a little produced 

 and rounded in front. Columella-margin regularly excurved, while 

 the portion that joins the body-whorl is decidedly flattened. The 

 inner lip along the body-whorl is represented by a thin but continu- 

 ous and closely adherent deposit of enamel, not showing a free edge ; 

 the lip anteriorly and on the columella-margin is distinctly thickened. 



Length, 2-3">" ; breadth, 2'""'. 



Station 2115, off Cape Hatteras, in 843 fathoms, one specimen 

 (No. 38,244). 



