318 3. IGUANIDM 



two, from the Yosemite Valley, 4000 feet altitude, seems to 

 be intermediate in size and color between this form and a 

 series of S. o. occidentalis at hand from western Mariposa 

 County." 



Distribution.— TKii subspecies inhabits the upper basins 

 of the Tuolumne and Merced rivers, between altitudes of 

 7,300 and 8,200 feet, in Yosemite National Park. Here, 

 it has been taken, in the Canadian Zone, half way between 

 Merced Lake and Sunrise Trail, 7500 feet; Echo Creek 

 basin, Merced River at 7300 to 7500 feet; near Merced 

 Lake, 7500 feet; Washburn Lake, 7640 to 7700 feet; lower 

 McClure Fork, Merced River, at 7800 feet; Lake Tenaya, 

 at 8100 feet; and at Glen Aulin, Tuolumne River, at 7300 

 feet. 



Habits. — It is stated that in the Yosemite Park this sub- 

 species lives on and beneath boulders and in rock-slides on 

 rocky, sunlit slopes in the heavily glaciated region in the 

 upper Merced basin, about Lake Tenaya, and in the head of 

 Tuolum.ne Canyon. 



6i. Sceloporus becki Van Denburgh 



Channel Island Blue-bellied Lizard 



Plate 25 



Sceloporus becki Van Denburgh, Proc. Cal. Acad. Sci., Ser. 3, Zool., 

 Vol. 4, No. I, 1905, pp. 3, 9, pi. IV (type locality, San Miguel 

 Island, California); Van Denburgh & Slevi.n, Proc. Cal. Acad. 

 Sci., Ser. 4, Vol. 4, 1914, pp. 132, 134. 



Sceloporus biserialus becki. Van Denburgh, Proc. Cal. Acad. Sci., Ser. 

 3, Zool., Vol. 4, No. I, 1905, pp. 3, 1 1, 14, Van Denburgh & Slevin, 

 Proc. Cal. Acad. Sci., Ser. 4, Vol. 4, 1914, pp. 132, 135, 136. 



Sceloporus occidentalis becki Grinnell & Camp, Univ. Cal. Pubis. Zool., 

 Vol. 17, No. 10, 1917, p. 162; Stejneger & Barbour, Check List 

 N. Amer. Amph. Rept., 1917, p. 55. 



