bs 
ran 
1915.] NATURAL SCIENCES OF PHILADELPHIA, 349 
' Oreohelix strigosa var. 
] 
Two broken and very old “‘bones’”’ were found near the central 
. peak above the spring, where we found Ashmunella and Sonorella. 
The largest one, evidently adult, has the periphery bluntly angular 
in front, becoming rounded on the last half whorl. There are faint 
traces of bands above and below it. Spire rather elevated. Height 
10.6, diam. 17.5, umbilicus 4 mm. It differs from O. s. depressa 
by the angulation of the periphery. Possibly an exploration of the 
southern end of the range, which from a distance looks rather good, 
would reveal living Oreohelices, but we looked for them in vain in 
the central and northern parts. 
Thysanophora hornii (Gabb). 
Vallonia perspectiva Sterki. 
Bifidaria pilsbryana Sterki. 
Bifidaria ashmuni Sterki. 
III. PeEtoncitto MounrtvaIns. 
Sonorella hachitana peloncillensis n. subsp. 
The shell is a little less depressed than hachitana, with the last 
whorl not so deeply descending, the aperture not so oblique and a 
trifle larger. 
Alt. 13.5, diam. 23.7, umbilicus 3.8 mm. 
pete. | 22.8 mm. 
Bemther. 8) 19.6 0“ 
Peloncillo Mountains: Skull Canyon, Grant Co., New Mexico. 
| Types, No. 94,513, A. N. 8. P., collected by J. H. Ferriss, 1907. 
The genitalia (figs. 6A to 6C, and figs. 6D, E, penis-papille of 
other individuals) resemble the same organs in S. flora. The penis 
is encircled by a sheath which reaches nearly to the middle. The penis- 
papilla is slender, tapering, and subannulate or rather strongly 
annulate. Epiphallus and flagellum as usual in the group of hachi- 
tana. It differs from S. hachitana by the decidedly longer penis, 
which has a much longer basal sheath. The vagina is slightly 
shorter than the penis, while in S. hachitana and flora it is slightly 
longer. Measurements are given on page 328. 
The sole is fleshy-buff, of nearly uniform tint, the side areas not 
distinct. Back ashy; sides and tail flesh-tinted. 
EXPLANATION OF Puates V, VI, VII. 
Pirate V—Figs. 1, la, 1b, 1f—Ashmunella mearnsi (Dall). Station 5, Big 
Hachet Mts. 
Figs. 1c, ld, le—Ashmunella mearnsi (Dall). Station 11. 
