bo 
~] 
911) Bryant: Horned Lizards of California and Nevada 
DISTRIBUTION 
P. douglassi douglass is of common occurrence in Washing- 
ton, Oregon, Idaho and Utah. Bell (1828) in first describing it, 
gave its distribution as the banks of the Columbia River. C. H. 
Townsend (1887) records it from the western base (quoted in 
Van Denburgh, 1897, as northern) of Mt. Shasta, California. 
No other record of its occurrence in California is known, but it 
seems possible that it may range south from Oregon into the 
northern part of the state. It has been recorded from the fol- 
lowing localities: Mt. Shasta, Shasta County, California; Des 
Chutes River, Grants, Willamette Valley, and between Warner’s 
and Goose lakes, Oregon; Fort Steilacoom, Fort Walla Walla, 
North Yakima, and Spokane, Washington; near head of Birch 
Creek, desert at sink of Big Lost River, Clear Water River, 
Lewiston, Arco, American Falls, Snake River, Pocatella, 
Shoshone, Conaut, Cottonwood Creek, and Big Butte, Idaho. 
Measurements: Measurements in the tables are in millimeters 
and were taken as follows: ¥ 
Total length: from tip of snout to tip of tail. 
Width of head: greatest width, across parietal region from tip 
to tip of temporal horns. 
Snout to ear: from tip of snout to auricular aperture. 
Occipital horns: from junction of horns to oceipital bone to 
tip of horn. 
Fore limb: from axilla to tip of longest toe on right fore limb. 
Hind limb: from axilla to tip of longest toe on right hind limb. 
Base of fifth to end of fourth toe: from base of fifth to tip of 
fourth toe on right hind limb. 
