344 



PROCEEDINGS OF THE ACADEMY OF 



[June, 



region but little trenchant, edges of body otherwise rounded. Gill- 

 opening extending forward a trifle before front rim of pupil. Rakers 

 about 10 + 14, slender, lanceolate, longest about | of longest fila- 

 ments and apparently rather weak. Filaments about f of orbit. A 

 few strise on each scale. Color in alcohol nearly uniform dull brownish, 

 back a little darker and line of demarcation about level with upper 

 margin of orbit distinct. A grayish elongate humeral blotch, most likely 

 much faded, and in length nearly equal to diameter of eye. Base of 

 caudal brownish and this color also extending out on median caudal 

 rays. Fins otherwise all pale brownish. Iris brassy-brown. Length 

 4\ inches. Two examples. 



Astyanax finitimus (Vaillant and Pellegrin). Fig. 32. 



Predorsal region with a low median keel and one also on postventral, 

 other edges of body rounded. Gill-opening not quite reaching front of 

 orbit. Rakers 8 + 13, lanceolate, longest about | of filaments and 



Fig. 32. — Astyanax finitimus (Vaillant and Pellegrin). 



latter about f of orbit. • Isthmus a little broadly triangular. Each 

 scale with several radiating striae. Color in alcohol brownish, back 

 deeper and this color sharply separated from that of lower surfacej^y^a 



