260 PROCEEDINGS OF THE ACADEMY OF [Mch., 



distribution. The radula has fewer teeth in a transverse row than in 

 the hachitana from the Florida Mountains near Deming, New Mexico; 

 but only one radula from each locality has Vjeen examined. 



The color and other external features of the foot are as described for 

 S. virilis. The internal anatomy was described and figured in my 

 paper of 1900, PI. XXI. The spermatheca in another specimen of 

 the same lot was globular, as in other Sonorellas, not ovate with thick- 

 ened duct as in the individual figured, which was stuffed with spermato- 

 phores. The penis was wrongly described in my former article. I 

 did not then open it, and considered its upper portion to be epiphallic. 

 "Wlien opened (PI. XX, fig. 15) it is found to be a long, thin-walled sack, 

 the upper half containing a long, slender, more or less convoluted 

 papilla {p.p.). This is a little longer than in the hachitana examined 

 from the Florida Mountains. Otherwise the genitalia are practically 

 the same in the Florirla Mountains and Purtyman's ranch snails. 

 Sonorella hachitana bowiensis n. siibsp. PI. XVIII, figs. 29-32. 



The shell is similar to hachitana but is much smaller, with 4|^ to 4^ 

 whorls. The suprapcripheral band shows on about 2\ whorls, above 

 the suture on the spire ; on the last whorl it has very faint, inconspicu- 

 ous pale borders or none. No spiral lines are present in most specimens, 

 but in two they may be seen very faintly, near the periphery. Seven 

 fully adult shells measure : 



Bowie, Cochise county. Types No. 86,497, A. N. S. P., collected by 

 James H. Ferriss, 1904. Specimens were also taken by Mr. Ashmun 

 at the same place. Mr. Ferriss writes that they were taken "in a 

 situation exceedingly favorable for snails." 



The genitalia (PI. XX, figs. 10, 11) show externally only slight differ- 

 ences from hachitana. The penis and epiphallus are comparatively 

 a little longer. Internally, however, the penis differs in having a 

 short, obtuse papilla, only about 3 mm. long (PI. XX, fig. 10), while 

 in the forms referable to hachitana the papilla is twice as long, slender 

 and tapering. These features, which I have confirmed in a number 

 of individuals, indicate a certain amount of racial differentiation which 

 may properly be recognized in nomenclature. 



The jaw (PI. XXIII, fig. 22) has four low, wide, unequal ribs and 

 some minor riblets. 



