144 NEW-YORK FAUNA — MOLLUSCA. 
Fusus ISLANDICUS. 
PLATE VIII. FIG. 185. 
Murex islandicus. Lin. Gmel. Syst. Nat. 3555. 
Fusus corneus. Say, Ameri¢an Conchology, pl. 29. 
Fusus islandicus. Gouxp, Invertebrata of Mass. p. 284. Var. pygmeus, fig. 199. 
Description. Shell elongated, symmetrically fusiform. Spire regularly attenuated to the 
apex: volutions eight, slightly convex. Body-whorl equally inflated, its surface covered 
with between forty and fifty small revolving ribs which are conspicuous through the epidermis ; 
these become almost effaced towards the outer lip, when the vertical sinuous strie appear in 
their places. These ribs or revolving elevated lines are reduced to fifteen on the next whorl 
above, diminishing in numbers as we ascend, the intervening furrows becoming more profound, 
with very faint traces of vertical lines. Aperture oblong-ovate, half the length of the shell : 
canal short, sinuous and wide. Callus on the columella broad: lip sharp, very minutely 
impressed by the terminations of the revolving lines. 
Color. Epidermis horn-colored or soiled brown: surface beneath, whitish opalescent ; 
within pearly white. 
Length, 2°9; of aperture and canal, 1°6. 
Dr. Gould has noticed and figured a variety of this shell, which he calls Var. pygmaeus, 
0:8 long, which has six whorls. Mr. Sowerby considers it as a species. Through the kind- 
ness of Dr. Jay, I am enabled to describe this shell, which was obtained from the stomachs 
of codfishes on our coast. Farther north, it is found along the shores. It must be con- 
sidered as a northern species, as yet not ascertained to occur on the shores of this State. 
Fusus vENTRICOSUs. 
PLATE VIII. FIG. 183. 
(STATE COLLECTION.) 
Fusus ventricosus, Gray, Beechey’s Voyage, Zoology, 117. 
F. id. Goutp, Invertebrata of Mass. p. 285, fig. 200. 
Description. Shell subfusiform, ventricose. Whorls five, rounded, rapidly attenuating to a 
blunt apex: body-whorl much inflated, composing the greater part of the shell. Surface 
covered with a velvety epidermis, under which numerous minute and regular revolving lines, 
with a few vertical wrinkles, are apparent. Spire short, not exceeding 0°4 above the body- 
whorl: lip simple, smooth ; columella with a broad callus ; canal slightly recurved. 
Color. Epidermis chesnut-color ; beneath white. 
Length, 1°95; of aperture and canal, 1°45. 
T am indebted to Col. Totten for this species, obtained from the stomachs of fishes on the 
coast, most probably an inhabitant of deep water. Iam not aware that it has been actually 
found on the shores of the United States. 
