900 ft., 1/2 mi. s. Crater Elegante, 34 mi. w. Sonota, Sonora. March 27, 1938, continued. contents of the former were saved. After putting up the specimens (with which Dr. Benson helped me) we climbed the crater and with the use of the Humboltz Hornaday map verified our position. Until we had made this survey and seen the inside of the crater we were not positive where we were. From the crater rim the surrounding country was seen to be of the expected flat desert floor with the hills and mountains arising abruptly. From the steep slope of this crater many deep cutting washes radiate; these cut the lava fields and spread out, and some coalesce to form wider washes. The vegetation of the near vicinity is mainly creosote, ochotillo, iron wood, palo verde, soft succulents, mesquite, some patayos, saquaro and some c[illegible]cholla (+ many small cacti that I do not know). The trees are mainly confined to the washes; the creosote and ochotillo found everywhere. Crater Elegante earns its name from the beauty of the stratified rock (running #horizontally and completely around the inside in 7 or 8 wide rings) and the symmetry of the crater-bowl which is nearly circular. Saquaros (as in other craters seen except Cerro Colorado), mesquite, and creosote grow on the crater floor where a dry pool surrounded by vegetation shows that water may stand there for a part of the year. The rim of the crater stands about