ELKaldstern 1955 Buffo borax Stages # 10-11 Feb. 22 Richard, Contra Costa Co., Calif. Palustris & moru (1937) late One batch of freshly laid eggs (early cleavage) on an area 4'x6' in grassy over 20 feet south of the extreme N end pond A. Another 5'x5' batch (different female?) at approximately same develop- mental stage lies just W of first group. Fill dirt Concrete slab N 40' 30 yards egg mass. site of weather stat. 16" deep Crude sketch of N end Pond A showing location of eggs. Typha A peninsula of grasses (sedge?) growing up out of the water appears to have been a favored deposition site. The grasses are 8-16" tall, green, to 10" above water surface. Water depth 6-8" where eggs laid but the strings are mostly less than 3-4" below surface due to entanglement in the grasses lying at all angles here. Strings single or double, longest, criss-crossing each other suggesting an actively moving female.