CAPRINE 



117 



(6 inches). Compared with canadensis, the horns are 

 lighter, less curved outwards, and smoother, with a less 

 pronounced front outer angle ; orbit less prominent, with the 

 frontal region between them less concave; nasals flatter; 

 and the row of cheek-teeth longer (3f inches) in the under- 

 mentioned specimen against 3J inches in a larger skull of 

 typical canadensis. The type specimen is a female, which 

 is stated to differ from meodcana and nelsoni by its inferior 



FIG. 34. HEAD OF SONORAN BIGHORN (Ovis canadensis gaillardi). 

 From a photograph by Messrs. Dracopoli. 



size and smaller feet, as well as by the absence of a white 

 muzzle and a dark dorsal stripe. 



The range includes the mountains of north-western Sonora 

 and south-western Arizona. 



12. 5. 14. 1. Head, mounted (fig. 34). Pinacate Moun- 

 tains, north-western Sonora. 



Presented by Messrs. I. N. and J. Dracopoli, 1912. 



