138 NEW-YORK FAUNA— MOLLUSCA. 
GENUS CANCELLARIA. Lamarck. 
Animal with a large head, and resembling that of Purpura. Shell solid, oval or globular, 
cancellated. Spire little elevated, pointed. Aperture semioval, notched or subcanaliculate 
at the base. Canal very short, almost none. Columella nearly straight, with prominent 
plaits or folds varying in number, usually transverse : lip internally furrowed. Opercle 
horny. 
CaNCELLARIA COUTHOUYI. 
PLATE VII. FIG. 160. 
(STATE COLLECTION.) 
Cancellaria buccinoides. Cournovy, Bost. Jour. Nat. Hist. Vol. 2, p. 105, pl. 3, fig. 3. 
Cc. couthouyi. Jay, Cat. Goutp, Invertebrata of Mass. p. 283, fig. 190. 
Description. Shell ovate-conic, subturreted ; apex acute. Whorls five to seven, convex, 
flattened above, reticulated, with transverse furrows, and plaited longitudinally, these plaits 
becoming occasionally distinct elevated folds : suture distinct and deep. Body-whorl forming 
two-thirds of the total length, and ventricose. Aperture oval, half the total length, effuse at 
the base, and subcanaliculate. Lip thin, acute, slightly crenulate on the inner edge; the internal 
strie indistinct. Columella arched, with three oblique folds; the central one somewhat 
longest. A callus, more or less distinct, on the body-whorl. 
Color. Epidermis thin, olivaceous ; under which the shell is opake white. 
Length, 0°55; of aperture, 0°35. 
Mr. Couthouy, the original describer of this species, was not aware that the same specific 
name had been applied by Mr. Sowerby to a Cancellaria from the Pacific ocean. Hence the 
present name, which, although implying a merited compliment, is, as Dr. Gould observes, in 
conformity with a bad custom. It is an arctic species, and hence it is not probable will be 
found along our shores, except under the same circumstances in which it occurs on the coast 
of Massachusetts, viz. in the stomachs of fishes. In the specimens to which I have had 
access, the strong folds on the whorls are not so distinctly elevated as in the figure and de- 
scription of Mr. Couthouy. According to the same writer, the lip has no internal strie ; but 
they were observed by me, although indistinct. 
