Cantu Bloss 1973 Journal 17 mi. N. Groome Baldy, Fenner Valley, Lincoln Co., Nev. July 27 extremo. It was cold, but not so cold as on the dry slope in Smith's Creek valley, which is 150 mi. N. of here. The sky was clear at night. Capture record as follows: 3 Dipodonyx Ordii; 4 Microdipodops pallidus, 3 Perognathus sp., 2 Perognomys. No microps taken here. The Ordii were taken at the top of the mounds, some on the slope prominent or small dunes. It seems that dune areas, with fine sand, are the domain of D. ordii, with microps invading those areas only as saltwort is a dominant plant. No new specimens today, we pushed up and drove towards rail road valley. We stopped at the pass in between the two, over 6000 ft, and waited here, again shielding the glass from the sun. Railroad Valley, Lincoln Co., Nev. SR 25 passes through the west end of the valley. There is some water in tranches along the road; and cattle are grazing here. Most of the vegetation is