532 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



The type-specimen of this gazelle, which is nearly related only to 

 Procapra gutturosa, was shot by Lyman at the point where the trail 

 south from the Bain-Chagan Pass turns westerly, on the edge of the 

 Suok Plain, Mongolia, July 5. In his notes on the game of the trip 

 over the Mongolian border I find a few references to gazelles. He 

 mentions seeing a female soon after crossing the frontier, south of 

 Tchegan-Burgazi Pass ; four on the Suok Plain, July 5 ; and later in 

 the same day, well up among foothills, three or four bunches of 

 five or six each. Later notes mention a few in the Tayliike Valley. 



EXPLANATION OF PLATES. 



Plate 37. 



Collecting stations in the Altai Mountains. 



Upper. Camp on the Chuisaya Steppe. 



Middle.' Camp on the Tchegan-Burgazi River. 



Lower. Camp in the forests of Pinus cemhra near Tapucha. 



Plate 38. 



Natives of the Altai and Habitat of Platycranius. 



Fig. 1. Kirghiz marmot hunter and horse. 



2. Camp on Tschomia Creek, showing rock slide inhabited by AUicola {Platy- 



cranius) strelzovi. 



3. Kalmuk horse owner. 



Plate 39. 



Scenes in the Altai Mountains. 



Upper. Yaks (Poiphagus grunniens) in Alpine meadow. 

 Middle. Young male ibex (Capra sikirica fasdata) at Kosh-Agatch. 

 Lower. The "last timber" to the south, on the border of the desert Altais. Larches 

 {Larix sibirica) in valley of Tschomia Creek. 



Plate 40. 



Skull of Ovis ammon, U.S.N.M. Cat. No. 175180, male, from Altai Moimtains, 

 Mongolia. (Greatly reduced). 

 Fig. 1. Dorsal view. 

 2. Ventral view. 



Plate 41. 



Skull of type-specimen of Procapra altaica, U.S.N.M. Cat. No. 175179, Suok Plains, 

 Mongolia (one-fourth natural size). 



Fig. 1. Lateral view. 

 2. Dorsal view. 



Plate 42. 



Skull and teeth of type-specimen of Procapra altaica, U.S.N.M. Cat. No. 175179, 



Suok Plains, Mongolia. 



Fig. 1. Left upper tooth row, natural size. 



2. Left lower tooth row, natural size. 



3. Skull, ventral view (one-fourth natural size). 



