298 CROCODILID&. 
PEROSUCHUS FUSCUS. 
Cope, ll. ce. figs. 
Snout broad and flat, rounded at the end, without any ridges. A 
transverse row of six small anterior nuchals ; the large nuchals in 
four transverse rows, all of four scutes except the last. Dorsal 
scutes, six or eight in each transverse row. Fingers free, toes half- 
webbed. No posterior crest on arm or leg. Tail short, with 
remarkably low crest. Colour above dark brown, almost black on 
the upper surface of the head; tail paler, light olive-brown ; eyelids 
and a band through the car yellow; lower surfaces everywhere 
bright yellow. 
Total length 73 centim. 
Magdalena River, Colombia. 
