132 Proceedings of the Biological Society of Washington. 



d* ad. 9 ad. 



Cranial measurements (millimeters) 210585 210586 



Condylo-basal length 265 



Basilar length of Hensel ... 249 



Front of parietals to nasals 105 97 



Greatest breadth across orbital rims 153 139 



Least breadth of skull between orbits and horn cores . 140 102 



Least breadth face in front of orbits 86 83 



Breadth at facial tubercles 88 84 



Nasals, length 105 



Nasals, greatest breadth 45 35 



Length palatine bridge (median) 22 24 



Length posterior nares 57 55 



Length underjaw, angle to middle incisor 217 195 



Last molar to posterior margin jaw 53 48 



Length upper molariform series 86 83 



Length lower molariform series 90 88 



Horns, greatest length around curve 735 325 



Horns, circumference at base (dry and shrunken) . . 320 



Stomach contents of mountain sheep {7-year-old ram) killed by Charles 

 Sheldon in the Rosario Mountains, Sonora, March 10, 1916. 



From about a quart of coarsely chewed vegetable fragments the follow- 

 ing plants were identified by Vernon Bailey and Paul C. Standley: 

 Ground cherry (Physalis) — many seeds and a few husks; Joint-fir (Popo- 

 tillo of the Mexicans, Ephedra)— two seeds and stems; Evening primrose 

 (Anagra) — one woody capsule; Mallow {Sphaeralcea) — a few seeds; 

 Brittle-bush (Encelia, two sp.) — stems, seeds, and heads common; 

 Hosackia (Lotus) — one seed capsule; Spurge (Croton) — three seeds; 

 Buckwheat bush (Eriogonum) — stems common; Bedstraw (Galium) — a 

 few leaves and stems; Spiny bush (Krameria) — stems common; Iron tree 

 (Olneya tesota) — leaves and stems common; Lichens — a few bits; Grass — 

 no trace that Professor Hitchcock, the grass expert, could detect. More 

 than half of the stomach contents is unidentifiable. 



