A. E. Verrill— Mollusca of the New England Coast. 201 
Ganeza, sp. 
A single specimen, referred to this 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. Whorls 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 growth. 
Length, 2°5™"; breadth, nearly 3™™. 
This form might be, with equal propriety, referred to Cyclostrema. 
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 narrowed 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). 
