MAMMALS OF THE MEXICAN BOUNDARY. 133 



and has an altitude of 775 meters (2,543 feet), the highest neighbor- 

 ing point reaching 1,410 meters ( I, <'>•_'('> feet) in height. Mountain 

 Spring is about 6.5 kilometers (4 miles) north of Monument N<>. 231, 

 135 kilometers (84 miles) west of the Colorado River, and 92 kilo- 

 meters (57 miles) east of the Pacific Ocean. There are some rushes 

 and a few mesquite and screw-bean trees around the spring, and 

 much underbrush, yucca, cacti, and ephedras on the surrounding hills. 

 A little higher up the slopes the juniper /one begins, and vegetation 

 becomes more luxuriant. The mammals that were collected here 

 were of much interest, as some of them were intergrades between the 

 forms of the Colorado Desert and those of the Pacific Coast Tract. 

 My party remained at this place from May !) to 16, 1804. 



Reptiles and batrachians. — The following-named species have been 

 taken on the east side of the Coast Range: 



Lizards. 



Crotaphytus collaris (Say). 

 Sauromalus ater Dumeril. 

 Callisaurus draeonoides ventralis ( llal- 



lowell). 

 I tn mearnsi Stejneger. 

 Tin stansburiana Baird and Girard. 



Sceloporus orcutti Stejneger. 

 Sceloporus vandenburgianus < !ope. 

 Phrynosoma blainvillei Gray. 

 Zablepsis henshawi stejneger. 

 Verticaria beldingi Stejneger. 



Snakes. 



Lichanura roseofusca Cope. i Crotalus ruber Cope. 



Zamensis flagellum flagellum (Shaw). : Crotalus confluentus lueifer (Baird and 



Rhinechis elegans (Kennicott). Girard). 



Pityophis catenifer (Blainvillei. Crotalus mitchelli Cope. 



Hypsiglena ochrorhyncha Cope. 



Batrachians. 

 Hyla regilla Baird and Girard. Bitfo columbiensis Baird ami Girard. 



Station No. 80. — West side, near summit of Coast Range moun- 

 tains, San Diego County, California. This station is 5 kilometers (3 

 miles) north of Monument Xo. 232, 138 kilometers (86 miles) wot of 

 the Colorado River, and 80 kilometers (55 miles) east of the Pacific 

 Ocean. Altitude, 050 meters (3,117 feet). The writer and Mr. Holz- 

 ner were at this place May 10 and 17, 1804. 



Flora of Wagon Pass. — This pass reaches the zone of California 

 juniper and single-leaf pinon, and belongs to the Upper Austral Life 

 Zone, barely penetrating the Transition Zone on the highest neighbor- 

 ing peak-, which do not rise above 1,410 meters (4,626 feet)." To tin 1 

 west is the beautiful Jacumba Valley. The following is a list of the 



"A list df the trees and shrubs (if the upper Austral (Transition) and lower 

 Boreal (Canadian) zones is given in the description of Station No. 92, about 30 



kilometers (1!) miles) north id' .Monument Xo. 240. in a high part of the Coast 

 Range. 



