Murray 1948 72 Journal May 20 Irwin, 1700ft., Baja California Mammals found here were: Perognathus spinatus - Commonest mouse but not found in great numbers. Mostly along the brush fences of corrals Perognathus baileyi - Trapped 2 along a brush fence Peromyscus eremicus - Fairly common, mostly along brush fences. Neotoma lepida - Caught 2 in 2 traps set in front of nests. Quite abundant. Citellus leucurus - Very common Lepus californicus - Saw one in a field. Thryon cinereoargenteus - Lewis trapped one. We were told they are numerous. Pipistrellus hesperis - Common at first in evening. Eptesicus fuscus - Common flying in evening. Also took a few in building. Jadarada mexicana - Found many in one building Dasypterus ega - Shot one and Dr. Benson another. Myotis velifer - Took 2 in a building. Reptiles found were: Callisaurus draconoides - Very common Cnemidophorus tesselatus - Common " hyperthrus - " Sceloporus magister - Saw 2.