Ls 
some New Species of Marine Shells. 289 
& 
horn-color; spire short, ovate, not acute; sutures small; 
whorls four, flattish ; last whorl round ; base smooth ; mouth 
ovate; acute above, rounded below. Long. .10. Lat. .06 
poll. 
Hab. Long Island, near Brooklyn. 
Remarks. The spire varies somewhat as to length in dif- 
ferent specimens. The whole shell is of a uniform dark 
greenish horn-color. There is a slight depression about the 
umbilical region, but in no specimens that I have examined 
does it amount to a perforation. The whorls are but slightly 
convex, and the sutures small, which gives the shell a very 
regular appearance. The margins of the mouth are united 
over the last whorl by a very thin plate of calcareous matter, 
which in some specimens is almost obsolete. 
"This little shell appears to be quite common on the shores 
of Long Island, _ just below Brooklyn, where I found it cling- 
ing to the arido sur of stones below high water mark. 
It approaches the C. minuta, but is easily distinguished by 
the absence of the umbilicus, and by its dark color, » bgdes 
_ the flatter whorls and regular spire. 
C.rurricunus. Pl. XXIV. Fig. 6. Proc. B. S. N. H., 1. c. 
conica, Mk suturis hates 5 sn frastibus EN ei anfractu ahim 
sub-bullato ; perforatione parva, arctatá, lunatá ; aperturd ovatà ; columella 
crassa, anfractu ultimo pene disjuncta. 
Shell elevated, conic, perforate, smooth, thick, tawny ; 
spire very much exserted, conical, obtuse; sutures small ; 
whorls six, convex; last whorl slightly bullate; base smooth; 
Perforation small,- narrow, lunate; mouth ovate ; cdbsnile 
thick, ies disjoined from the last whorl. 
Lat. .05 po 
Hab. PAA Carolina. * 
Remarks, The substance of the shell is very thick and 
Color, a light yellowish ind sometimes ap- 
P'oaching to white. im surface is occasionally somewhat 
Wrinkled with lines of growth. The spire is elevated, and 
