342 PROCEEDINGS OF THE ACADEMY OF [June, 



and a little longer than pupil. Fins all brownish. Iris brownish with 

 rosy tint. Length 3f inches (caudal damaged). Type. 



Cope's description would give the depth of the body 4^^ in its length 

 without the caudal, wiiile in the above example it is but 2|-. The head 

 is said to be 4^, while the above example shows it about 3f . He gives 





Fig. 30. — Astyanax longior (Cope). 



the eye 3h in the head, though the interorbital width is much less than 

 Ij-^Q in the eye, in fact but little less than the orbit itself. Both 

 examples have Cope's original label. 



Astyanax maximus (Steindachner). 



Tetragnnoptems sp. indet. Cope, Proc. Amer. Philos. Soc. Phila., XVII, 

 1877-78 (May 17, 1878), p. 691. Peruvian Amazon. Prof. J. Orton. 

 Coll. 1873. 



Head 3f to 4; depth 2f to 2^; D. i, 9; A. iv, 28, i to 29, i; scales 34 to 

 35 in lateral line to base of caudal and 2? more on latter; 7 scales in an 

 oblique series back between origin of dorsal and lateral line; 7 scales 

 from base of ventral to lateral line; 7 or 8 scales in a vertical series 

 between origin of anal and lateral hne; 17 scales before dorsal; pectoral 

 a trifle less than head; ventral 1^ to 1^; snout 3^ to 4 in head, from tip 

 of upper jaw; eye about 3; interorbital space 2f ; length of larger 

 example with damaged caudal 4f inches. Rakers 10 + 16, lanceolate, 

 slender, longest but little shorter than filaments which are about § 



