1911.] NATURAL SCIENCES OP PHILADELPHIA. 421 



Dorsal origin a little nearer snout tip than caudal base, first branched 

 ray longest, though tip of third depressed branched ray reaches well 

 behind tip of last, and fin If to caudal base, or a little longer than head. 

 Adipose fin inserted a little nearer caudal base than last dorsal ray 

 base, fin base slender and end a little expanded, reaches 2 to caudal 

 base. Anal base long, origin of fin about opposite second branched 

 dorsal ray base, first branched ray longest with others graduated down 

 about first half in fin length, after which rays uniformly lower. Caudal 

 emarginate (damaged), apparently about long as head ? Pectoral 

 inserted low, extends well beyond ventral origin. Latter midway 

 between pectoral and anal origins, fin about f to anal. Vent close 

 before anal. 



Color when fresh in rum ecru-brownish generally, paler to whitish 

 with bright silvery on sides below. Head pale brownish above, sides 

 and below burnished brilliant silvery- white. Iris deep umber, with 

 rather reddish tinge. Lips brownish. A grayish humeral spot about 

 size of pupil. No caudal spot. From humeral spot to median caudal 

 base an underlaid leaden streak, very narrow and well defined behind, 

 overlaid silvery. Upper edge of body dusted with dull or pale brown- 

 ish. Dorsals, caudal and anal dull olivaceous-brown, and other fins 

 paler. 



Length H inches (caudal tips damaged). 



Type No. 37,863, A. N. S. P. Corisal, Venezuela. February 27th, 

 1911. F. E. Bond and Stewardson Brown. 



Nos. 37,864 to 37,866, paratypes, same data. Head 3j to 3+; 

 depth 2; D. iii, 9, i; A, iii, 29, i to hi, 32, i; scales in 1. 1. 30 to 32 + 

 2 or 3; scales above 1. 1. 8 or 9; scales below 1. 1. 9 or 10; predorsal 

 scales 14 or 15; snout 4 to 44/ in head; eye 2 T \ to 2h; maxillary 2f 

 to 2f ; interorbital 2f to 2f ; length If to lh inches (caudal tips dam- 

 aged). 



Though the scales are not entirely distributed over the caudal fin 

 at present, they were evidently so' when the examples were fresh, 

 and for this reason I have restored them on the accompaning figure. 

 P. bondi differs from all the known species in its deeper body, which 

 suggests Tetragonopterus. P. pectinatus (Cope) has the anal beginning 

 before the dorsal origin, which may be seen on comparing my figure, 

 wrongly called Astyanax longior} The species I have figured as 

 A. pectinatus 2 is A. longior (Cope). P. megalostictus Eigenmann and 



1 Proc. Acad. Nat. Sci. Phila., 1906, p. 342, fig. 30. 



2 L. c, p. 341, fig. 29. 



