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- 
le 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, t1,f 4. 
Type locality: —San Clemente Island, Cal. (Hemphill). 
1496 Hemphill, Henry: 
New varieties of western land shells. Nautilus 4:41-48. 
Describes the following forms, numbers 1497-1500. 
1497 Helix ptychophorus 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 5%, 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 
strize, interrupted by numerous wavy lines and oblong blister-like 
wrinkles, hardly perceptible to the naked eye; whorls 5%, 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 
