182 PROCEEDINGS OF THE ACADEMY OF [March, 
6,700 feet. Shells 14 to 15 mm. diameter, normal in shape and color, 
similar to lot No. (10). This is farthest north for the species. 
Oreohelix yavapai profundorum n. subsp. Pl. XII, figs. 1-14. 
The shell is opaque-white with some brownish, corneous streaks and 
often tio fleshy, brown bands, the inner whorls more or less flesh- 
tinted; solid; with sculpture of rather wide, irregular, subobsolete 
growth-wrinkles, but no spiral strie. Whorls 4} to 5, the last angular 
or subangular in front, descending moderately or deeply to the aperture, 
often becoming shortly free. Aperture very oblique or subhorizontal, 
the peristome slightly thickened and brownish, continuous and free 
or in contact with the preceding whorl for a short distance. 
Fig. 1. Alt. 12.0, diam. 14.8 mm. 
Cea era ee Ta” SW 
8 HO, yl oy)" s ambilieus 3): wide: 
Ce A OS ee CO. 
5 Obes ey 2 > imipilicus 4 Samus yee: 
ce 10. a3 9.0, (as iS °2 ee ‘é 2.9 ce “c 
Adult shells measure from 13 to 174 mm. diameter. 
The genitalia are figured (fig. 4). The lower half of the penis is 
much swollen, the upper half slender and 
cylindric, the retractor muscle inserted 
at its apex. The short epiphallus is 
rather stout. Vagina short and very 
large. The uterus in the individual 
figured contained four embryos; the shells 
4,7 mm. in diameter, with 2? whorls and 
acutely carinate. periphery. The podo- 
cyst is larger on the upper embryos, but 
present in all. 
Length of penis, 6.7 mm.; epiphallus, 
3mm.; vagina, 4mm.; spermatheca and 
duct, 17 mm. 
Out of 100 shells from the type locality, 
taken at random, 56 per cent. resemble 
: figs. 1-3, 44 per cent. being like figs. 4, 5. 
ac Sit aan a Pre” The race is therefore markedly senile. 
Grand Canyon, in ‘Spectacle Cove,” 
Station A, the head of a recess in the cross-bed sandstone south of 
where the Mystic Spring or Bass Trail zigzags down, in a talus resting 
on the red sandstone forming the Le Conte Plateau. Elevation about 
—— LL ULL CCC CCU Uhl lr! 
