MONOGRAPH OP THE GENUS STROPII[A. 
ished, regular and somewhat arranged in lines and are very slightly 
inclined from right to left. The whirls are not bulging, and the suture 
is shallow. 
Aperture, small, not widely open, not contracted within, circular, 
being about as high as wide. The lower tooth is small, and short, about 
.03 high and about twice as long as high. It is set back a little more 
than once its length from the frontal bar. and is placed a little to the 
right of the center. The upper tooth is placed half way up the side of 
the aperture, but back of the lower ; it is about as high as the 1 ower 
and extends back around the column. 
The margin is not produced forward quite as far as the diameter 
of the shell ; it is a little inclined backward, but is not inclined to the 
right, being straight, yet it projects a little beyond the side of the shell. 
It is a little thickened, about .03, is rolled over, but is not flanging, 
thus the face is smoothly rounded. The outer edge is not produced 
backward, but is sharpened. The frontal bar is not well developed, be- 
ing nearly absent in the middle. 
Color of shell, externally, yellowish white, with rather broad, lon- 
gitudinal stripes of reddish brown, which are frequently broader than 
the white interspaces, and which are not much, if at all, encroached up- 
on by white lines. Internally, reddish brown, becoming paler on teeth 
and margin. 
DIMENSIONS. 
Size of typical specimen, .65 by .30. Largest specimen, .72 by .32; 
smallest, .60 by .30. Longest specimen, .65, shortest, .60. Smallest 
diameter, .30, largest, .32. 
OBSERVATIONS. 
Individual variation consists in a greater or less number of mark- 
ings. There are two well marked forms. 
Form No. 1, larger than the type, nearly white in color, nearly un- 
marked. The margin is thicker, and the aperture rounder. Size, .75 
by :35. Whirls, 9. 
Form Nol 2, smaller than the type, color similar, size, .60 by .30. 
Whirls 8. 
This is beyond all doubt, the Pupa cyclostoma of Kuester as both 
his description and figure would seem to indicate. A translation of 
his description is given below. 
Smaller than the foregoing species ; this is through its shape rela- 
ated with it, being connected with it through the hanging lip. While it 
is connected with P. uva with the continuous free lip. From P. uva it 
is distinguished by its color. The shell is oval-cylinderical; above, a lit- 
