08 December 1972
Vol 178, Issue 4065

About The Cover

Cross section (25 &mgr;m ) of leaf of salt bush (about X 300). (Insert) Great Basin or chisel-toothed rat on the top of a spiny saltbush. Most kanagroo rats forage for seeds in the soil, but this species is an aboreal leaf forager. See page 1094. [G. J. Kenagy, University of California, Los Angeles]