292-306. (Caudisona mitchellii, new species, pp. 293–294). External links Crotalus angelensis at San Diego Natural History Museum Crotalus mitchelli at San Diego Natural History Museum Crotalus mitchellii pyrrhus mitchellii Reptiles of the United States Reptiles of Mexico Fauna of the Southwestern United States Fauna of the Sonoran Desert Fauna of the Colorado Desert Fauna of the Mojave Desert Fauna of the California chaparral and woodlands Natural history of Baja California Taxa named by Edward Drinker Cope Reptiles described in 1861