THE NAUTILUS. E15 
Reinhardt described another, C. trochulus, from Texas. I do not 
know that this has ever been noticed by any subsequent writer. 
Finally, Dr. V. Sterki, that indefatigable observer of small shells, 
whose researches have added so much to our knowledge of American 
iniand mollusks, described a toothed Conulus, the first dentate form 
of the genus known, as C. fulvus var. dentatus. § 
The shell figured by Binney in the Manual of American Land Shells 
(p. 67, fig. 26), is evidently C. fulvus. It will be noticed that he re- 
cords considerable divergence in dentition between the observations of 
various observers, Morse giving 18-1-18 as the formula of teeth, with 
7 laterals on each side; Binney, 30-1-30, with 8 laterals, and Lehmann, 
25-1-25. This, as Binney remarks, is more variation than often, if 
ever, occurs among individuals of one species, especially in view of 
the comparatively small number of teeth. The difference between 
the two American observations is 24 teeth in a row, the totals being 
61 (Binney) and 37 (Morse). This probably indicates that two dif- 
ferent species were under observation by the two observers. Unfor- 
tunately the limited time at my disposal, and the limited number of 
specimens with the soft parts dried in, has prevented me from exam- 
ining the dentition, which I hope to do when more abundant material 
collected alive and with the animals dried in, is available. We may 
now notice the American forms in detail. 
Conulus fulvus (Miiller). 
The species was originally based in part upon a larger shell of the 
genus Hygromia, but authors agree in considering as the true fulvus 
a shell much less elevated than chersinus, with five whorls, not so closely 
coiled as in the several forms of chersinus, the last one distinctly 
angular in front, the angle disappearing on the latter part of the 
whorl ; base convex, indented and minutely perforate or subperforate 
at the axis. Distinguished from chersinus and its varieties by the 
fewer, wider whorls and generally less elevated contour. Helix 
egena Say seems to me to be equivalent to fulvus. It is widely 
distributed over the northern half of the Union and Canada, The 
Rocky Mountain and California C. fulvus seem to be nearly typical 
Julvus, though slightly diverging forms are present. 
Conulus fulvus mortoni (Jeffreys). 
Rather more depressed, the periphery of the last whorl distinctly 
carinated throughout; whorls about 43. Described from England. 
2 This journal, Vol. VII, p. 4 (May, 1893). 
