10 PROCEEDINGS OF THE ACADEMY OF [1883. 



NOTES ON THE GEOGRAPHICAL DISTRIBUTION OF BATRACHIA AND 

 REFTILIA IN WESTERN NORTH AMERICA. 



BY E. D. COPE. 



The following notes are based on collections made by myself 

 and my assistants at various points in the Rocky Mountain and 

 Pacific regions during the last ten years. They describe the range 

 of various species of our terrestrial cold-blooded vertebrata, and 

 contribute to the final definition of the zoological provinces and 

 districts of the continent. 



1. Lake Valley, New Mexico. 



This locality is at the western border of Dofiana County, twenty 

 miles N. E. of Fort Cummings. It is in the foot-hills of the 

 Mimbres or Negretta range. The region is rather arid, springs 

 not being numerous ; but during July and August there are frequent 

 rains. Yegetation is abundant in the form of grass and herbaceous 

 plants and shrubs. 



Scaphiopus sp. Young. 

 Rana halecina Kalm. 

 Phrynosoma cornutum Harl. 

 Full of eggs in June. 



Phrynosoma modestum Gird. 



Yery abundant in August ; not seen during two days' visit in 

 June. 



Ctotaphytus collaris Say. Abundant. 

 TIta schotti Baird. 



There is but one median smaller row of dorsal scales, so that 

 the single specimen approaches the U. nigricauda. Specimens of 

 this genus are abundant. 



Sceloporus 



A large species seen. 



Sceloporus. 



A small species seen. 



Holbrookia maoulata B. and G. Aljundanf, 



Yar. Jiavilenta, differs from the typical form in having larger 

 prenasal scales separated by only two flat scales in front instead of 

 four tubercular ones, and in having only four flat scales between the 



