238, 239, 241, 285-291. 1952: 20, 21, 47, 50-52, 55, R. Zweifel April 18, 1953 Rana baylei 211 Willow Ck., O'Neale, Madera Co., Calif. Open stand of digger pine, blue oak and interior live oak. Small stream averaging 4' wide but with pools up to 3' deep and 20' in diameter. Heavy growth of old willows and a few cottonwoods along its stream. Flow is slow, gradient slight. Water 21.2°C. Seven Rana baylei were collected and three or four more seen in about an hour's hunt. By way of contrast, R. aurora was extremely abundant. An estimate of one frog/20' of stream would probably be too low. For most of the length of the stream investigated, the stream border is typical R. aurora habitat for sub-optimal R. baylei. In most places, the grass and herbaceous vegetation comes right down to the water's edge, leaving no free open area. Most baylei were in the few places where there was exposed rocky or sandy bank. Also present were Rana catesbeiana (one individual seen), Hyla regilla, Clemmys marmorata, Coluber constrictor momus and Thamnophis elegans couchi.