Hendrickson 1950 2 Helicops Nov. 30 46km. S, 22km. W San Martin, 1600ft, Meta, Colombia, S.A. This snake was "swimming" in swift water where the creek flowed over a smooth section of bed rock to the river. It "swam" under water, bracing itself on bottom irregularities for about 3 minutes before a good opportunity for seizing it arrived. Eventually it reached a pile of three large rocks in midstream; it entered a crack in this pile under water, and with prodding, its head appeared above water. "dorsal" scale rows scale rows neck mid-body post. body (just ant. to anal) Dactrostege Urostegae 26 23 17 132 78/79 + 1 terminal Snout vent length = 554 mm. Total length = 784 mm. Dorsal view of head with color lower jaw 12 infra- scales labials 11 infralabials