MUSEUM OF COMPARATIVE ZOÖLOGY. 169 
Miss Law thus wrote from Philadelphia, Tenn., of this species: “ Unlike 
gularis, it seems to be a rare shell, and I find it only by scraping off the sur- 
face of the ground in the vieinity of damp mossy rocks. Its habits are more 
like placentula than gularis. I never mistake one for a gularis, even before 
picking it up; the thickened yellow splotch near the lip, and the thinner spot 
behind, showing the dark animal through it, as well as its more globular form, 
particularly on the base, make it look very different when alive.” 
Zonites macilentus, Snurtı. 
Plate III. Fig. 3. 
The individuals of this group are very often difficult to identify, on account 
of the blending of their specific characters. The typical macilentus is distin- 
guished by a very wide umbilicus and a single revolving lamina starting from 
near the basal termination of the peristome. The figure of macilentus in Vol- 
ume V. shows a second revolving lamina and a much smaller umbilicus. I 
give here another figure of what appears to me to be the shell described as 
macilentus. How constant are the characters of the species can be shown only 
by a large suite of individuals. 
Tebennophorus Hemphilli. 
Plate III. Fig. 4. 
I give a figure of the jaw already described by me. 
Patula strigosa, Gourp, var. jugalis, Hemrmite. 
Shell umbilicated, depressed with numerous prominent oblique striae; spire very 
moderately elevated or depressed ; whorls 53, somewhat flattened above, but more 
convex beneath, the last falling in front, with two dark revolving bands, one at the 
periphery and the other above; the body whorl subcarinated at its beginning, but 
more rounded as it approaches the aperture; suture well impressed; color ashy 
white, with occasional horn-colored stains; umbilicus large, pervious, showing the 
volutions; aperture oblique, ovate, but in very depressed specimens the aperture 
is at right angles with the axis of the shell; peristome simple, thickened, its ter- 
minations approaching and joined by a thick heavy callus, making the peristome 
in very adult specimens continuous. Height of the largest specimens + inch, 
breadth 1 inch. Height of the smallest specimens ;% inch, breadth 44 inch. 
Patula strigosa, var. jugalis, HemPHILL, The Nautilus, 1890, p. 134, in Binney’s 
3d Suppl, p. 215, figure. 
Banks of Salmon River, Idaho. 
This is another interesting form of the very variable strigosa. It inhabits stone 
piles, and other places where it can find shelter and protection against the fatal 
rays of the summer’s sun, close along the banks of the river. It is interesting on 
