330 PROCEEDINGS OF THE ACADEMY OF [May, 
in great profusion at Station 5 on the east side of Daniels Mountain, 
near the summit, with Holospira bilamellata.. Also at Stations 7, 10 
and 11, the latter at the summit of Hacheta Grande. 
The specimens from Station 5 (not far from the site of Dr. Mearns’s 
camp) agree well with the original specimens, description and figure. 
Usually the parietal callus is raised from the surface as a thin, straight 
lamina, and in almost all of them the edge is more definite than in 
shells from other stations. The axial end of the parietal lamella 
is abruptly bent towards the columella and is more or less tubercular; 
Rarely the tubercle is almost free from the lamella. The spire is 
occasionally almost flat. The color in shells taken alive is translucent 
sayal brown. The diameter varies from 11.5 to 14.5 mm. 
In specimens from the summit of Hacheta Grande the parietal 
lamelle are a little shorter; the axial end of the longer branch is 
often straight, but more fre- 
quently is bent, or the bend is 
represented by a tubercle con- 
nected with, or almost free from 
the lamella. |The edge of the 
parietal callus is appressed to the 
surface, and is often arcuate. 
The aperture varies in obliquity, 
as the figures show. 
The penis is stout, bipartite. 
The epiphallus is strongly con- 
voluted just beyond the insertion 
: of the retractor muscle. It is 
Fig. 3.—Genitalia of A. mearnst. epi, MED) long. No flagellum seen. ~ 
PES Ne a eee The spermatheca is largest in the 
eens fa wes ' “middle, thin-walled. Length of 
penis 4.5 mm.; epiphallus 30 
mm.; vagina 4mm.; spermatheca and duct 19 mm. 
A. mearnsi lives in the earth under stones, like A. walkeri in the 
Floridas, both being burrowing species. It is closely related to 
A. kochi Clapp and A. walkeri Ferriss, but quite distinct from both. 
A. levettei bifurca in the Huachucas is a less depressed shell with 
more whorls. 
Oreohelix (Radiocentrum) hachetana n. sp. Plate VI, figs. 1 to 1d, 6. 
The shell is depressed, umbilicate, the umbilicus about one-fourth 
the diameter of the shell; moderately solid, but thin, opaque whitish, 
obliquely streaked or smeared with various shades from light cinna- 
