Kendrickson 1950 Helicops Nov. 25 Helicops, 22 km W San Martin, 1600 ft., Meta, Colombia, S.A. #1611 taken under dead leaves and sticks (stream drift) on cobble and sand-mud bar beside creek near its mouth on Rio Dujjar. Temp. of snake = 25.3° C. air temp at 6" (shade) = 26.2° C. substrate = 24.6° C. water of creek = 23.6° C. The snake was about 4" above, 24" from the water of the creek, about 30 yds. from its junction with the Rio Dujjar. The bar on which I found it is about 15 yds. long x 8 ft. wide. About 6' from the snake was a 3' high cut bank, above which was the forest. The creek is clear and fast. Nov. 29 - Color notes: Head: (dorsal) Rt eye: Ant. -> Ventral Surface: (1/3 way post.) pattern of black repeated & gap of 1 . clear scale between blotches Side view: (1/3 way post.) Tail (v. surface) Nov. 30 Took one (no number - specimen given to Dr. Medem) at about 9:30 P.M. about 15 yds. below collection locality of #1611.