REPTILES OF THE PACIFIC COAST. 85 



surfaces of limbs provided with strongly keeled and 

 pointed scales. Scales on posterior surface of thigh 

 large, accuminate, strongly keeled and pointed. Upper 

 caudal scales similar to dorsals, but having longer points. 

 Femoral pores varying in number from eleven to fifteen 

 on each thigh. Five to ten dorsal scales equaling 

 length of shielded part of head. Number of scales in 

 a row from interparietal plate to a line connecting pos- 

 terior surfaces of thighs varying from twenty-nine to 

 thirty-five; average in thirty specimens, thirty-one and 

 two tenths. Males with enlarged postanal plates. 



The back is gray, yellow, brown, or copper-color, with- 

 out distinct markings or with a very broad (4-5 scales) 

 band of dark brown along its anterior half in adult 

 males, irregularly spotted or blotched with dark brown 

 in females and young. There is a strongly contrasted 

 black bar or collar in front of each shoulder. Faint in- 

 dications of dark lines may sometimes be seen on the 

 head. The tail is brown or olive with indistinct brown 

 rings or cross-bars. In highly colored males, the throat 

 has a central patch of blue, which gradually fades an- 

 teriorly and changes to black posteriorly. The belly 

 has lateral bands of deep blue, more or less bordered or 

 replaced with black. The scales of the sides are variously 

 tinted with black, blue, green, yellow, orange, red, and 

 brown. There usually is a black area in front of the 

 thigh. In females and young, the throat and belly are 

 usually white or grayish yellow. 



Length to anus 35 50 68 88 106 109 



Length of tail 51 67 99 112 149 158 



Snout to ear 10 12 16 20 24 25 



Width of head 9 10 14 16 24 25 



Shielded part of head 10 11 15 17 20 20 



Fore limb 17 24 31 42 45 53 



Hind limb 27 35 49 58 68 72 



Base of fifth to end of fourth toe. . .11 14 19 23 25 28 



