R. Zorich Mar. 29, 1953 Rana boylii 209 Marsh Cr, 6.3 mi SE Clayton, Contra Costa Co. Calif. A total of 19 seen, 14 of those captured. Juveniles nears. Water 9.4 to 10.0° C. The stream is clear now, but in some pools there is 3-4" of fine red silt. Two Rana aurea were seen. The extensive growth of juniper and cattails is starting to move from last fall's equinox and borne devastation, at least in that portion of the stream near the bridge, where stock seems to be absent now. An attempt to produce ovulation in one of the females failed. Dissection of the three adult females in its group developed all to be in post breeding condition! One small F, SV 43 mm, contained large ova.