OF SANTO DOMING O. 



235 



lip, an acute outer lip and an obsolete umbilicus, instead of the thickened margins 

 and no umbilicus of that g-enus. 



D. m e 1 a n i 0 i fl e s . Gabb, n. s. 



Shell oval, spire elevated, whorls ten, the first three nuclear, the others rounded on the sides, angulated above and 

 flattened and a little sloping near the suture. Surface marked by numerous minute longitudinal ribs reaching over 

 the angle to the suture and becoming obsolete on the middle and anterior portions of the body whorl. On some 

 specimens there are very minute revolving striiB. Umbilicus minute, imperforate and bordered by a small ridge or 

 angle. Aperture sub-oval ; inner lip thinly encrusted, continuous behind with the outer lii) which is acute and 

 slightly sinuous, most prominent in the middle. Canal very short, not emarginate. 



I have tried to identify this species with the shell described by Guppy as Melan- 

 opsis capvla,"^ which it seems to resemble somewhat in form and size. But that author 

 gives his shell but seven whorls, and does not describe or tigure the flattened tops of 

 the volutions, which are a marked character of the present species. There ai'c also other 

 differences which, however, might be explained by want of care in the artist, l^ut which, 

 nevertheless, lead me to believe that, while there may be a generic relation between 

 the two shells, they are most probabl}'' different species. , ■ . ; 



CYPR^A. Linn. : ' 



C. Henikeni. Sby., Quart. Jour., Vol. VI., p. 45, pi. 9, fig. 3. , 



A very variable species ; sometimes the tubercles are entirely wanting, and distor- 

 ted specimens are occasionally found. The colors are light spots on a dark ground, 

 similar to those of C. reticulata and C. cermis, but proportionately largei-, contracting 

 the dark parts to the net-work of thick lines. 



C. Isabella. Linn., Syst. Nat., (12 Ed.), p. 1177. ' - ' 



A few specimens Avere found which, in the absence of color, I cannot separate from 

 this well known species. They agree in all the details of form, teeth, &c. 



C. s pure a. Linn.. Syst. Nat., (12 Ed.), p. 1179. 



My shells agree perfectly in form, size and detail with the recent forms, but two 

 of them show a color pattern which may possibly warrant a separation. They are 

 covered with round spots of different sizes, about as numerous and as variable in size 

 as those of C. argus 



C. sj)urcoides. Gabb, n. s. 



Shell similar in form to G. simrca, but somewhat broader and more narrowed in advance. Callous broad, convex 

 below, and slightly exj^anded laterally, not crenulated above as in G. spurca. Crenulations of both lips well defined, 

 more numerous on the inner than on the outer lip. Color pattern mottled irregularly. * 



In color and size, this not unlike C. hicaUosa, but it differs from it in form and in 

 the absence of the two callosities. It wants entirely the marginal pittiugs of C. 

 spurca, which it njiproaches nearest in form. 



* Quart. Jour., Gcol. Soc., Vol. XXII, p. 5S0, pi. 26, fig. U- 



