264 PROCEEDINGS OF THE ACADEMY OF [Mch., 



{Ramsey Canyon) (Carr Canyon) 



10.8 10.2 11.3 



18.8 : 17.5 17.7 



6. On the south side of the range, specimens were taken in Cave 

 Creek Canyon, typical in form and sculpture, but larger, 12.6x20.8 

 mm. 



7. Ida Canyon (PI. XVIII, figs. 36, 37, 38). Typical in shape and 

 color, but with slightly effaced granulation, very weak spirals, and 

 variable size. 



Alt. 11.9 10.4 9.3 mm. 



Diam. 21.3 19.8 17.8 " 



8. Bear Canyon. Similar to the Cave creek form, 11 x 19.3 mm., or 

 more depressed, like Miller Canyon shells, 10.7 x 20.8 mm.; umbilicus 

 2.9 mm. 



Sonorella granulatissima parva n. subsp. PI. XVIII, figs. 4')-47. 



Shell with the sculpture of S. granulatissima, but much smaller, and 

 suhangular at the periphery. Whorls 4^,, convex, parted by well-im- 

 pressed sutures, the last moderately descending in front. The band is 

 wide, without pale borders, and is visible on two or two and a half 

 whorls. 



Alt. 9.3 10 9 mm. 



Diam. 16 16 15.2 " 



Alt. apert. 7.4 " 



Diam. apert. 8.3 " 



Umbihcus 2.4 " 



West end of the Huachuca Mountains, between Fort Huachuca and 

 Manilla Mine. Types No. 87,114, A. N. S. P., collected by James H. 

 Ferriss, 1904. 



Eleven specimens of this small form were obtained at the place men- 

 tioned. It is chiefly notable for the subangular periphery, v^ry unusual 

 in Sonorella. It is very similar to S. mearnsi Bartsch, differing in the 

 wider umbilicus and more oblique aperture. S. mearnsi may prove 

 to be a subspecies of *S. granulatissima, but its internal anatomy is 

 unknown. 

 Sonorella granulatissima latior n. subsp. PI. XVIII, figs. 24-28. 



This form is very similar to S. granulatissima, from which it differs 

 in the usually larger size and the more depressed last ivhorl. The granu- 



