116 THE NAUTILUS. 
It oceurs in Massachusetts, New York and at Hamilton, Ontario, but I 
have not seen this from the South or West. It is the size of typical 
fulvus, the young of which must not be mistaken for mortond. 
Conulus fulvus alaskensis, n. var. 
Similar to C. fulvus but with only 43 whorls, the iast one wider ; 
periphery a little angular in front, becoming well rounded ; columellar 
insertidn of the lip reflexed over the perforation, nearly or quite closing 
it. Alt. 2.6, diam. 3.25 mm. Dyea valley and Point Romanoff, Alaska 
(P. B. Randolph). 
Conulus chersinus (Say). 
This is very much elevated, the height of fully mature examples 
exceeding the diameter, the general form being somewhat like that of an 
immature Cerion. Outlines of spire quite convex ; whorls 63, appear- 
ing very closely coiled, as seen from above, the last only faintly an; 
gular, though in immature shells itds carinated. The base is quite 
convex and the umbilical perforation very narrowly open. The lunate 
aperture forms a less attenuated crescent than in the following va- 
riety. Alt. 3, greatest diameter 2.8 mm. This form occurs from the 
Sea Islands of Georgia to Florida, the specimen illustrated being from 
Volusia county (coll. Pilsbry and Johnson, 1894). 
Conulus chersinus trochulus (Reinhardt). 
Similar to the preceding, but lighter colored, less elevated (though 
still high), the crescentic aperture narrower. Alt. 2.75, diam. 2.8 mm, 
New Braunfels, Texas. Though near chersinus, this form is not dif- 
ficult to distinguish, and will probably stand as a southwestern sub- 
pecies. 
Conulus chersinus polygyratus, n. v. 
Similar to the preceding, but less elevated, with narrower aperture ; 
whorls over 6, very narrow, the last one bluntly but decidedly an- 
cular in front, the angle above the middle of the whorl, base peculiarly 
sloping below the periphery; upper surface with the lustre of silk; 
base glossy, with a silky band around the outer margin. Alt. 2.2, 
diam. 3 m., sometimes larger. Color generally deep, brownish am- 
ber. Hamilton, Ontario (associated with C. fulvus mortont) ; Grand 
Rapids, Michigan (with C. fulvus). Differs from typical chersinus 
and trochulus chiefly in the peculiar form of the base, produced by 
the high situation of the periphery, and the narrower aperture. The 
numerous narrow whorls readily distinguish it from fulvus. 
Conulus chersinus dentatus (Sterki). 
Rather small, with the narrow whorls of the species, the last whorl 
