Mayhew 1958 Journal 83. May 16 Mojave Desert, San Bernardino Co., Calif. another load. In addition, mammal traps were set by the class. Animals catched that night were: Rhinochilus lecontei Lichanura roseofusca Callisaurus draconoides (gravid - 5 eggs) Crotalus cerastes Crotalus mitchellii (DOR) Bufo boreas Perognathus longimembris Crotaphytus wislizeni Dipodomys meriami (trap) Also seen were: Canis latrans Dipodomys sp. May 17 Additional specimens of the species mentioned previously were caught this morning. A female Dipsosaurus dorsalis was also captured 2 miles S. of Barstow as we returned from breakfast. After breakfast we began looking for the marked tortoises that had been released near the bench mark (3 other tortoises were marked & released at the campsite & 4 young ones were brought back to Riverside). Only one (No. 4) was found, and it was approximately 1/4 mile S.E. of the release point (found at 11:30 AM [POST]). In spite of our efforts, none of the others were located. However, 2 Crotalus cerastes were found in Sophora dens. Mark Kohn caught one of them and brought it back to camp. Later, Rudy Ruibal demonstrated how fast the