Oc. Papers, Cal. Acau. Sci., Vol.. X 



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Fig. 1. Crotalus mttchdlU, Bleached Rattlesnake 

 Section o( skin of specimen collected at San Jose rlel C.ibo, ijower Califo 



Fig. 2. Crotalus cerastes. Horned Rattlesnake 

 Section of skin of specimen from the Moliave Desert, California, 



