The amphibians and reptiles of Colombia are perhaps better known than are those of any other South American country, thanks to the work of Dr. Emmett Reid Dunn during the years 1943 and 1944.His work has greatly facilitated the identification of collections of amphibians and reptiles from Colombia, and for a generation every further contribution to the knowledge of this segment of a noteworthy tropical region must be based on his publications.Dr. Dunn's revision of the turtles of Colombia makes possible the ready discrimination of the new form here described.A small collection of amphibians, reptiles, and fishes, purchased by Chicago Natural History Museum from the well-known collector, Mr. Kjell von Sneidern, of Popayan, contains a series of turtles from Pizarro, at sea level, in the Choco and near the mouth of the Rio Bando.This series includes a single specimen each of Geoemyda annulata and G. nasuta, a series of specimens of Kinosternon spur- relli, and two specimens of a remarkably distinct new species of Kinosternon.The description of the new form follows.