1910.] NATURAL SCIENCES OF PHILADELPHIA. 57 
Fig. 3.—Principal collecting stations in the northern canyons of the Dos Cabezas 
range. 
Genitalia, Pl. III, figs.1,2,4,7. Penis of moderate length, somewhat 
less than one-third the length of spermatheca and duct, with a long 
retractor muscle; the penis-papilla (pp.) cylindric, annulated distally, 
with conic tip. Epiphallus somewhat shorter than penis; flagellum 
0.6 or 0.7 mm. long. Vagina generally not much longer than the 
penis. Sole (in alcohol) ochre or dirty white, uniform or with 
slightly darker sides. Back gray, the flanks and tail very pale. 
Jaw with 6 to 8 ribs, grouped in the median half. Radula with 
26,12,1,12,26 to 27,13,1,13,27 teeth, centrals and laterals without 
ectocones; some of the marginals with both cusps bifid. 
Type No. 94,328 A. N.S. P., from Buckeye Canyon, Dos Cabezas 
range of the Chiricahua Mountains, at Station 1, fig. 3. 
It ranges throughout Buckeye and Happy Camp Canyons, and at 
