-—— res. —— 
S- 
1911.] NATURAL SCIENCES OF PHILADELPHIA. 185 
5,700 feet. Cotypes, No. 103,234 A. N. 5. P., collected by Ferriss 
and Pilsbry, October, 1906. 
The embryonic shell, of 24 whorls, shows fine subregular ripples 
along the lines of growth, and in places some fine, very faint spiral 
strize may be traced ; on the base these spirals are more distinct. They 
continue there during the first part of the neanic stage, but disappear 
after a diameter of 8 or 9 mm. has been attained. The main spirals 
are widely spaced, as in QO. yavapai, but at all stages of growth they 
are very weak. The embryonic shell is light brown. Some maculze 
and streaks of opaque cream-white appear after the third whorl. In 
the adult stage the surface becomes dull white and somewhat chalky 
from loss of the very thin cuticle, which is present in the embryonic 
and early neanic stages. 
QO. y. projundorum and the allied races, extremitatis and angelica, 
differ from O. yavapai by the very weak spiral striation of the embry- 
Fig. 5.—Spectacle Cove (Station A), from opposite side below Bass Trail. Type 
locality of Oreohelix yavapat projundorum on the mound at left end of talus slope. 
onic shell. O. profundorum resembles O. yavapai, O. y. neomexicana 
and O. borbata in having a very short penis, its length about half the 
diameter of the shell or less. In the strigosa group, so far as known, 
the penis is long, two-thirds the diameter of the shell or more, in 
alcoholic examples. O. yavapat, neomexicana and profundorum are 
alike in genitalia, but O. borbata differs by having the retractor muscle 
snserted on the epiphallus, whilst in the others it is inserted at the 
apex of the penis. 
The type locality of O. y. profundorum is in an embayment of the 
cross-bed sandstone, where a talus at its foot rests upon the red sand- 
