158 
MONOGRAPH OF THE GENUS STROPHIA. 
rounded, sometimes beveled without being grooved, and sometimes 
beveled with a groove. There is also a tendency to produce a flecked 
form and one which is grayish in color which is inclined to be larger, 
with a thickened margin, and through this into the typical sub-species, 
S. glans grisea, next described. With all this individual variation, 
which are not pronounced enough to describe as distinct forms, we 
have three distinct forms, that are inclined to appear in locations of 
their own. 
No. 1 is decidedly more cylindrical, the first, second and third 
whirls being about equal in diameter, the stria tions are more 
numerous, twenty-five to the first whirl, and they are even less promi- 
nent than in the type. While the color externally is slightly inclined 
to be grayish, externally ; internally, it is paler, with the space in front 
of the tooth, and around it, white. There are about two per cent, of 
this form. 
No. 2. Form and color that of the type, excepting that the 
whirls are nine, with the size small, .80 by .37. There are about four 
per cent, of this form. 
No. 3, a large, heavy shell with, a thickened margin (about .10), 
that is beveled and decidedly grooved. The form is a pointed 
cylinder. The striations are narrower and are inclined to be angular. 
As far as I can judge from an account, which, like most of the 
older descriptions of shells of this genus, is much too brief to clearly 
define any species, and from a good figure, the shell that I have 
described above is most undoubtedly the species which Kuster had in 
hand when he described his Pupa glans. Thus we can with consider- 
able certainty establish the status of another of the old species of 
Strophia. 
The locality from which Kuster’s type came is unknown 
and the following is his original description in Latin, with a transla- 
tion : 
“ Testa rimata, ovata acutiuscula, roseo-alba, fortiter costata, 
costis confertis oblis ; anfractibus, 10, convexusculi, angustis, ultimos 
fusco-subfusciatus ; apertuta semiovata, intus nitida, palada flava, 
peristomata recurvo, incrassato, parie aperturali umplicatus7 > 
Shell fissured (umbilicated), rather acutely oval, rosy-white, 
striations prominent, striations close together and oblique; whirls, 
ten ; somewhat rounded, narrow, the last partly fusciated with fuscous. 
Aperture, semi-oval, polished within, and pale yellow. Peristome 
(margin) recurved, not thickened. Teeth of aperture, one. 
