88 PROCEEDINGS OF THE ACADEMY OF [March, 
zone fauna of small shells, Vertigo, Pupilla, Vitrina, Thysanophora 
ingersolli, etc., in common with similar elevations as far west as the 
Santa Catalinas in Arizona. Also the Canadian Oreohelix coopert. 
List OF SPECIES. 
The specimens have been studied by both authors. Types are 
in coll. A. N. 8. Phila.; paratypes in coll. Ferriss. 
HELICIDZ. 
ASHMUNELLA. 
The Black Range Ashmunellas resemble those of the Mogollon 
and Chiricahua Ranges in the genitalia. The penis is more or less 
distinctly bipartite by a submedian constriction. 
In A. binneyi, A. tetrodon, and in A. mogollonensis of the Mogollon 
Range, a retractor muscle of a few slender strands attaches to 
both segments of the penis and to the epiphallus further up, but 
there is no continuation attaching to the diaphragm. 
In A. mendax and A. cockerelli with its subspecies there is, in 
addition to the incoherent penial retractor just described, a broad, 
very thin and extremely short band connecting the epiphallus with 
the diaphragm. This is similar to the condition in most other 
Ashmunellas except that the connection with the diaphragm is here 
very short. 
All of the species have the usual short flagellum, about 1.5 mm. 
long. The constancy in Ashmunella of this minute, seemingly 
vestigeal organ is remarkable. 
Aside from the particulars noted above, the organs are much alike 
in the several species. For convenient comparison the measurements, 
in millimeters, are given in one table, A. mogollonensis being added 
for comparison. 
Ashmunella tetrodon Pils. and Ferr. 
Ashmunella tetrodon P. & F., Nautilus, XXIX, June, 1915, p. 15, Pl. 1, 
figs. 1-3a. 
Southern slope of the San Mateo Mountains, Socorro County, 
New Mexico. 
This species was described from the western slope of the Mogollon 
Mountains, and its occurrence in the San Mateo Range appears 
anomalous. The numerous specimens obtained are quite constant, 
showing none of the variations noted in the Mogollons. 
The genitalia of one of these specimens are figured, Pl. X, fig. 6. 
