Quast 1948 Journal 39 April 28 30 mi S.E. Mesquital 600 ft. Baja California Benson and a Horned Toad captured by myself yesterday afternoon. Shell mounds are abundant between Punta Prieta and Mesquital. April 29 Minimum last night was 50° F. No traps set. April 29 Mission San Ignacio 500 ft. Baja California Arrived here about 7:00 P.M. after a very rough and rocky trip from our previous camp. A change in the topography and vegetation occurred a few miles south of El Arco. The dense grouping of cactus, creosot, etc stopped with the occurrence of the stable sand and silt soil and the vegetation became scant when we went beyond El Arco. South of that point the road passes through very rocky land with hills topped with lava cap rock. Beyond that we went through desert with shifting sand and very little vegetation. The Cirios stopped completely at El Arco. The sand continued to a point called Los Angeles Coral where we started to climb onto the lava plateau and San Ignacio. The lava plateau was with scant vegetation and the Cardones became the outstanding plants – even they were yellow and appeared diseased, and I noticed a high percentage of dead ones.