MUSEUM OF COMPARATIVE ZOOLOGY. 195 
In size, shape, and general appearance it somewhat resembles /sthmia, yet lacks 
the rib-like striation; the lamella would be typical for Vertigo and some of the 
smaller Pupe but for the presence of the well developed supra-apertural which 
P. Clementina has in common with P. calamitosa, Pilsbry, and Hemphill’, Sterki; 
but, on the other hand, there is nothing of the characteristic palatal or gular folds 
of these two species. ‘Thus, in several regards, our form is an intermediate and 
connecting one between different groups, and consequently deserves our special 
interest. 
Pupa Clementina, Srerkı, The Nautilus, Vol. IV. No. 4, Plate I. Fig. 4, August, 
1890. 
The above is a copy of Sterki’s original description and figure. 
Pupa Dalliana, STERKI. 
Shell conic or ovate-conic, of greenish horn-color, transparent, finely irregularly 
striate in the lines of growth, polished ; whorls 44, well rounded, with deep suture 
rather rapidly increasing, the last occupying about } of altitude 
towards the aperture, somewhat ascending on the penultimate. 
Aperture lateral, somewhat oblique, subovate, with just percepti- 
bly flattened palatal margin; margins approximate, the ends pro- 
tracted; peristome shortly but decidedly expanded, with a very fine 
thread-like lip near the margin, the same continuing as a very fine 
callus on the apertural wall inside of the line connecting the ends of 
the margins; palatal wall quite simple; no lamelle. Alt. 1.2, diam. 
1.3 mm. Pupa Dallia na. 
This form has been collected by Mr. Hemphill near Clear Lake, 
Lake Co., Cal., and I propose to name it in honor of Mr. William H. Dall. The 
specimens before me were fifteen, fresh, remarkably uniform in their whole appear- 
ance; all were more or less covered with a dark brown hard crust of slime and 
dirt, generally thickest around the aperture. Doubtless this coating is done 
“ purposely ” by the animals, as in many other species also. When cleaned, it 
shows about the size and shape of a well grown Vertigo ovata, Say; but by a good 
eye, or under a glass, is at once recognized as something else, by the rounded 
aperture and the absence of lamella. (Sterki.) 
Pupa Dalliana, Srerkı, The Nautilus, Vol. IV. No. 2, p. 19, June, 1890. 
Dr. Sterki’s description is copied above, My figure was drawn by him from 
the type. 
Pupa syngenes, PILSBRY. 
Shell subcylindrical but wider above, composed of eight narrow, convex whorls, 
sinistrally convoluted ; texture as in P. muscorum, but color rather lighter brown. 
Last whorl ascending, imperforate, bearing a strong high crest just behind the 
