107 



of its last, third, ending at the auricle; a very slight, flat, crest- 

 elevation near the margin, only in the lower part; aperture lat- 

 eral, scarcely oblique, subovate with the palatal margin slightly 

 flattened, upper part of same somewhat sinuous, peristome a little 

 expanded, with a slightly thickened lip just at the margin; lamel- 

 lae 6, white; 2 on the apertural wall, the apertural, typical, and a 

 rather long supra-apertural, ending in a callus at the upper ter- 

 mination of the palatal margin; columellar one typical, horizon- 

 tal; basal very small, nodule-like, deep seated; palatals 2, typical, 

 the inferior a little longer. Alt. 1.9, diam. 0.8 mill.; apert.: alt. 

 6, diam. 0.5." — Sterki, Nautilus 4:44, t 1, f 4. 



Type locality:- — San Clemente Island, Cal. (Hemphill). 

 o 



1496 Hemphill, Henry: 



New varieties of western land shells. Nautilus 4:41-43. 

 Describes the following forms, numbers 1497-1500. 



1497 Helix ptvchophorus castaneus 



"Shell umbilicated, globosely depressed, of a dark chestnut 

 color; surface covered with coarse, irregular, widely separated 

 lines of growth, and crowded, microscopical revolving lines; 

 whorls 5y 2 , convex, the last slightly descending in front, spire 

 elevated; suture well impressed, aperture subcircular; lip white, 

 reflected and partially covering the umbilicus, its terminations 

 approaching; umbilicus small and deep. Height 5-eighths inch, 

 diameter 1 inch." — Hemphill. 



Type locality: — Old Mission and Rathdrum, Idaho. 



1498 Helix tudiculata subdolus 



"Shell narrowly umbilicated; globosely depressed, of a dark 

 yellowish color, surface somewhat shining, covered with oblique 

 striae, interrupted by numerous wavy lines and oblong blister-like 

 wrinkles, hardly perceptible to the naked eye; whorls 5y 2 , con- 

 vex, striped by a single chestnut band, double margined by higher 

 ones; spire very little elevated, suture well impressed; lip simple 

 reflected, and nearly covering the umbilicus, its terminations ap- 

 proaching and joined by a thin callus; umbilicus narrow and 

 small. Height 5-eighths inch, greatest diam. 1 inch, lesser % 

 inch. A very depressed form, quite variable in size, some of the 

 specimens not being more than half the size of the measurements 

 given." — Hemphill. 



Type locality: — San Jacinto valley (now Riverside Co.), Cal. 



1499 Selenites Vancouverensis Keepi 



"Shell umbilicated, greatly depressed, thin, smooth, shining 

 transparent, scarcely marked by the delicate wrinkles; very light 

 horn color; whorls over 4, somewhat flattened above and beneath, 

 and scarcely descending at the aperture; spire flat, not rising 

 above the body whorl; suture well impressed; umbilicus moder- 

 ately large, exhibiting most of the volutions; aperture trans- 

 versely subcircular, wider than high; lip simple, thickened, sin- 

 uous above, very slightly reflected at the base, ends scarcely ap- 

 proached. Width 5-16ths inch, height 2-16ths inch." — Hemphill. 



Type locality: — hills near Oakland, Cal. (Hemphill). 



Named in honor of Josiah Keep. 



1500 Selenites Vancouverensis hybrida 



"Shell broadly umbilicated, depressed, slightly convex above, 

 surface shining, polished, of a dark yellowish-green color, lines 

 of growth coarse, rib-like and regular on the spire, finer and more 



