106 



last occupying more than % altit.; aperture subovate or nearly cir- 

 cular, margins much approximate and the ends protracted, per- 

 istome shortly but decidedly expanded; lamellar one, apertural, 

 small. Alt. 2,5; diam. 1,5 mill." — Sterki. 



The above descriptions are based on material furnished by 

 Henry Hemphill. 



1403 Pupa Dalliana Sterki. 



"Shell conic or ovate-conic, of greenish-horn color, transpar- 

 ent, finely irregularly striate in the lines of growth, polished; 

 whorls 4%, well rounded, with deep suture, rather rapidly in- 

 creasing, the last occupying about 2-3 of altit., towards the aper- 

 ture somewhat rscending on one penultimate. Aperture lateral, 

 somewhat oblique, subovate with just perceptibly flattened palatal 

 margin; margin approximate, the ends protracted; peristome 

 shortly but decidedly expanded, with a very fine callus on the 

 apertural wall inside of the line connecting the ends of the mar- 

 gins; palatal wall quite simple; no lamellae. Alt. 1.2; diam. 1.3 

 mill." — Sterki. 



Type locality: — near Clear Lake, Lake Co., Cal. (Henry 

 Hemphill) . 



Named in honor of William Healey Dall. 



1494 Pupa Hemphilli Sterki. 



Sterki compares this with P. calamitosa Pilsbry, describing 

 this as averaging a trifle larger, but says either is somewhat varia- 

 ble in size. While calamitosa has a minute perforation, hemp- 

 hilli is umbilicated in quite a peculiar way: there is a nodule- 

 like projection on the umbilical part of the last whorl producing 

 a rima beside the umbilicus; in calamitosa there is nothing of 

 this formation. On the other hand, the latter has a small but 

 distinct groove-like impression just at the base, near the aperture 

 appearing as a slight projection inside; this feature is wanting in 

 hemphilli. — Lamellae: in the latter species, when looking from 

 front only one is generally seen in the palatal wall, corresponding 

 to the superior one in calamitosa, but longer, i. e., beginning 

 deeper in the throat, and fairly seen on the outside, also marked 

 there by a corresponding impression, ascending in a curve from 

 near the base; a little distant from its inner end, just above the 

 projection mentioned, there is another lamella beginning, directed 

 toward the base and ending there, also seen on the outside. Quite 

 generally there is a very small, thin, but well-formed lamella in 

 the palatal wall near the projecting auricle. The columellar fold 

 is quite short and small in hemphilli yet consisting of a vertical 

 and a horizontal part; the (main) apertural lamella is decidedly 

 longer in hemphilli, and the supra-apertural higher and entire, 

 while in calamitosa it is evidently composed of two parts marked 

 by an indentation in the middle, or even entirely separated, in 

 quite mature specimens. 



Type locality: — banks of Santo Tomas river, Lower Cal. 

 (Hemphill). Also collected at San Diego, Cal., by Hemphill, Orcutt 

 and others. 



1495 Pupa Clementina Sterki. 



"Shell very minute, narrowly perforate, cylindrical, pale horn 

 colored, transparent, with rather obtuse apex; whorls 5%, regu- 

 larly increasing, moderately rounded, with rather deep suture, 

 smooth, with few microscopic striae, somewhat shining; last whorl 

 occupying rather more than 2-5ths of altit., somewhat ascending 

 to the aperture, with a light, revolving impression on the middle 



