316 



PROCEEDINGS OF THE ACADEMY OF 



[June, 



Prochilodus iheraponura may thus be said to differ from all of the 

 others in the fact that it has but two obUque dark bars on the caudal, 

 aside from the median one. 



{dtpdr.iov, servant, with reference to the caudal bands, like those of 

 Therapon; obpa^ tail.) 

 Froohilodus amazonensis sp. nov. Fig. 15. 



Head 3^; depth 2f ; D. iii, 9, i; A. iii, 8, i; P. i, 16; V. i, 8; scales 

 about 43 in lateral line to base of caudal, and 5 more on latter; 11 scales 

 obliquely back from origin of dorsal to lateral line; 8 scales obliquely 

 forward up from origin of anal to lateral line; 10 scales obliquely up 

 from origin of ventral to lateral line; 15 scales before dorsal; wddth of 

 head If in its length; depth of head 1^; snout 3; eye 3^; maxillary 3j^ ; 



Fig. 15. — Prochilodus amazonensis Fowler. 



width of mouth 2f ; interorbital space 2; length of base of dorsal 1|; 

 length of base of anal 2|; length of pectoral If-; ventral (damaged) U, 

 least depth of caudal peduncle 2f . 



Body rather deep, compressed, back but little elevated so that upper 

 profile would form a rather obtuse angle at origin of dorsal, at which 



