THE NATURAL HISTORY SURVEY. 183 
Radula formula: %§+%-+41+2- 48(39—1— 39); teeth of 
the same type as others ie: the genus; central tooth longer than 
wide, the base of attachment with widely expanded lower outer 
corners, tricuspid, the central cusp very long and reaching 
much below the edge of the base of attachment, side cusps 
small; lateral teeth similar to central, bicuspid; marginals acu- 
leate, the first one or two modified. There are about the same 
number of rows as in hammonis. 
Distribution: Canada to Texas; Dakota to Maine and 
Florida; ‘‘Lower California and states of Jalisco and Morelos, 
Mexico.” (Pilsbry.) Manitoba (Hanham). 
Geological distribution: Pleistocene; Loess. 
Habitat: Same as arboreus and hammonis. 
Remarks: This species may be distinguished from the last 
by its subperforate umbilicus and peculiar equidistant im- 
pressed striz. The two species, though resembling each other 
when casually viewed, are readily separated when the charac- 
ters are once understood. The animal is very rapid and 
more bold than the other species. Jndentata is as widely dis- 
tributed as the last species, but is not nearly as common, only 
a few individuals being found together. 
Genus EUCONULUS Reinhardt. 
Conulus, F1Tz, 1853; non Rafinesgue, 1814 (vide Pilsbry, The Nautilus, 
Vol. XIV, p. 81). ; 
“Shell: Imperforate,or very narrowly perforate, turbinate, 
arcti-spiral; whorls 5 to 6, rather convex; aperture depressed- 
lunar, the penultimate whorl strongly excided, somewhat ob- 
lique. Peristome with margin separated.” 
“Ammal (of C. fulvus): Bluish-black upon the head, neck, 
and eye-peduncles, lighter on the sides and base; foot very 
narrow, tnread-like. A distinct caudal mucus pore.” (Bin- 
ney.)* 
69. Euconulus fulvus Draparnaud, pl. xxviii, fig. 17. 
Helix fulva DRAPARNAUD, Hist. Moll., 1805, 
Helix egena SAY, Journ. Phil. Acad., Vol. V, p. 120, 1825, 
Conulus fulvus mortoni JEFFREYS (vide Pilsbry). (Variety.) 
Conulus fulvus alaskensis Pitspry, The Nautilus, Vol. XII, p. 116, 
1899. (Variety.) 
Shell; Subconical, turreted, thin, pellucid, convex above, 
rounded below, subperforate; surface shining, smooth, marked 
*W.G. Binney, Man. Amer. Land Shells, p. 67. 
