ICHTHYOLOGY OF VENEZUELA — SCHULTZ 



25 



covered with prickles; color in alcohol plain pale above and below, no 

 spots anywhere, although specimen appears to be faded. 



The following measurements, expressed in hundredths of the dis- 

 tance from tip of snout to tip of sting, 210 mm., were made: Width 

 of disk 65.7; length of disk from snout tip to its rear edge not including 

 pelvics 61.7; interorbital space 6.90; greatest interspiracular space 11.4 



Figure 1. — Urobatis sloani (Blainville) 

 (U.S.N.M. No. 4656) from Cuba, 

 collected by Poey. Sketch by author. 



Figure 2. — Urotrygon venezuelae, new 

 species: Holotype (U.S.N.M. Nc. 

 121966), female, 255 mm. in total 

 length. Sketch by author. 



and least interspiracular space 8.57; diameter of eye 2.86; length^of 

 oronasal groove from edge of upper lip to its anterior edge 2.95; length 

 of snout 16.4; width across mouth 7.38; width of nasal flap 6.67; tip of 

 snout to center of anus 56.2; anus to base of sting 32.4; anus to tip of 

 sting 45.5; length of pelvics 12.6; anus to origin of the ventral fold of 

 caudal fin 46.2; length of exposed part of sting 15.9; length of spiracle 

 3.95; greatest width of basal part of tail 8.10; snout tip to first gill sht 

 25.0; greatest height of caudal fin 3.19. 



