Fishes of the Western North Atlantic 



431 



Figure loia. Urotrygon venezuelae, holotype, female, 255 mm long from Gulf of Venezuela (U. S. Nat. Mus., 

 No. 121966). Upper and lower surfaces. Tip of tail, 1.3 X; eye and spiracle, 3.8 X- 



about 50 "/o of distance back from tip of snout toward rear limits of disc. Tail from 

 center of cloaca about 1.16 times as long as distance from center of cloaca to tip of 

 snout; breadth at base about equal to distance between spiracles; tapering evenly rear- 

 ward to base of spine where it narrows more abruptly and becomes thin transversely 

 approaching caudal fin. 



