Hendrickson 1950 Jacaretinga Dec. 1 El Mico, 4 hkm., 5.22 km. W. San Martin, 1600 ft., Meta, Colombia, S.A. Went out with Carlos Balvayer at about 7:00 P.M. to forest E. of the ranch. We hunted for "cachiras" (Cairana) along a small, clear stream running through the dense forest. The stream runs fairly rapidly along its channel, but at many points is distributed over areas of quiet, clear pools and backwaters. I took two very young babies (# 8 # ) from 1"-2" of clear water in a 6'x10' pool, quiet, and with maximum depth of about 4". Water trickled into the pool at 3 separate points; there was a single with 3'-brook x 4" deep connection to the main stream course. Both babies ducked under and swam for cover underwater as I approached (rather noisily). When taken they began to give distress "croaks" and continued to do so for some time. The "croak" sounded almost identical the that given by the animal sawed near Villavicencio, as best I can recall it. About 7:45 P.M. I saw a larger (18"?) animal (# ). The babies were still croaking (in a sack hung from my belt) and the larger animal approached to within about