MARINE MOLLUSCA OF THE UNITED STATES. 39 
Color light horn, with numerous undulated vertical reddish 
dilated lines. 
Length 0.23; of aperture, 0.1. 
New York Harbor. 
The above is a copy of DeKay’s description. The species has 
not occurred to any other collector, and it is therefore impossible 
to decide upon its distinctness. DeKay himself, in describing C. 
lunata, suggests that this species is a variety of it, and the same 
opinion has been advanced by several marine conchologists. 
5. C. pissimiuis, Stimpson. Fig. 63. 
Proc. Bost. Soc. Nat. Hist., iv. 114. 1851. 
Buccinum zonale, Linsley, Am. Journ. Science, O. 8. xlviii. 285. 
Shell small, ovate-conical, solid, longitudinally sub-striate, fus- 
cous, often with three white zones; whorls five, flattened; aperture 
small, sub-equalling half the spire. Animal white. 
Length 5, diam. 2.5 mill. 
New England. 
6. C. stmiuis, Ravenel. Fig. 64. 
Proc. Acad. Nat. Sciences, Philad., 41. 1861. 
This has generally been considered the young or immature shell 
of C.avara. The latter is a larger shell, and has fewer and much 
larger ribs on the upper portion of the body-whorl.- It has about 
eleven ribs; whereas this shell has often as many as twenty ribs, 
but the number varies; the ribs are also smaller and more regular 
generally, occupy more of the whorl, and generally are continued 
on the spire to its apex. White mottled with rufous. 
The principal distinction between this species and C. avara con- 
sists in its narrower form and generally more numerous ribs. 
Although frequently confounded with the latter—with which it 
inhabits, it appears to be quite distinct. 
Massachusetis to Georgia. 
7. C. TRANSLIRATA, Ravenel. 
Proc. Philad. Acad. Nat. Sci., 42. 1861. 
Shell elevated conic, apex sharp; whorls nine, nearly flat, rather 
closely ribbed, ribs and interspaces about equal, with five equi- 
distant revolving striz, from the anterior canal to the apex; body- 
whorl angulated in the middle, and above this angle the ribs are 
about half as many as on the whorl immediately preceding it and 
nodulous at the suture; the nodules being white. Below the 
