424 



PROCEEDINGS OF THE XATIOXAL MUSEUM. 



vol. 48. 



I find that the Nevada specimens in question represent a race almost 

 intermediate between true Phyrnosoma douglassii douglassii and the 

 southern form liernandesi. Still in their larger size and longer head 

 spines they more closely approach the southern form. For this 

 reason it seems best to follow Cope (1898) in the use of a trinomial. 

 A small specimen in the United States National Museum collection, 

 locality "Salt Lake to Carson's Pan, Utah," is exactly comparable 

 to the two smaller specimens from Deeth, Nevada. The following 

 table will give the size relations between PTirynosoma douglassii 

 douglassii, PTirynosoma douglassii liernandesi from northern Nevada, 

 and Pli . douglassii liernandesi from Arizona and New Mexico : 



• 



Ph. doug- 

 lassii lier- 

 nandesi, 

 Deeth, 

 Elko 

 County, 

 Nevada, 

 5 females. 



Ph. douglassii doug- 

 lassii near Abert 



Lake, Lake 

 County, Oregon. 



Ph. douglassii her- 

 nandesi, Arizona 

 and New Mexico. 





Two 

 Males. 



Three 



females. 



Five 

 males. 



One 

 female 

 (juv.). 



Total length: 



Minimum 



75 



103.4 

 123 



24 



32.1 



39 



16 



20.9 



25 



13 



16.4 



19 



1.9 

 2.4 

 3 



22.8 

 27.7 

 32 



30 



37.9 



45 



12.6 

 14.7 

 16 



.285 

 .311 

 .326 



.190 

 .203 

 .213 



.151 



.160 

 .173 



70 

 74 



78 



23.5 

 25.7 



28 



13 

 14 

 15 



11 



11.5 



12 



1.1 

 1.1 

 1.2 



19.1 

 20.1 

 21.1 



26 



27.5 



29 



78.5 

 90.1 

 97 



22 

 25.6 



28 



15.5 

 17.6 

 18.7 



13 



13.8 



14.5 



1.3 

 1.5 



1.8 



22.5 

 24.8 

 27 



30 

 32 

 35 



10.5 



11.2 

 12 



.281 

 .284 

 .289 



.191 



.195 

 .197 



.148 

 .154 

 .165 



72.5 

 108.8 

 130 



27 



38.3 



46 



15.2 

 22.9 

 28.5 



12.5 



17 



20 



2 



2.9 



4 



21 



31.3 



36.5 



30 



40.6 



47.5 



10 



13.9 



16.8 



.315 



.353 

 .378 



.197 

 .211 

 .227 



.147 



.157 

 .172 





Average 



66.5 



Maximum 





Tail length: 

 Minimum . , 





Average 



21 



Maximum 





Width of head: 



Minirrmm 





Average 



16.1 



Maximum 





Snout to ear: 



Minimum 





Average 



13 



Maximum 





Length of occipital horns: 

 Minimum . 





Average 



1.5 



Maximum 





Length of foreleg: 

 Minimum 





Average 



22.5 



Maximum 





Length of hindleg: 



Minimum 





Average 



30.5 



Maximum 





Longest toe: 



Minimum 





Average 



10 



10 



Maximum 





Ratios to total length: 

 Tail— 



Minimum 



.335 

 .346 

 .358 



.185 

 .188 

 .192 



.153 



.155 

 .157 





Average 



.315 



Maximum 





Width of head— 

 Minimum 





Average 



.242 



Maximum 





Snout to ear — 



Minimum 





Average 



.195 



Maxim nm 









GERRHONOTUS PALMERI (Stejneger). 



Locality. — The Stanford University collection contains three speci- 

 mens of Gerrhonotus palmeri from the vicinity of Fallen Leaf Lake, 



