532 PROCEEDINGS OF THE ACADEMY OF [Oct.^ 



31; depth 3i to 3§; D. iii, 9; A. iv, 20, i to iv, 23, i; scales 32 to 35 

 in 1. 1. to caudal base and 2 or 3 more on latter; 6 scales above 1. 1.; 

 5 scales below 1. 1. to anal origin; 11 or 12 predorsal scales; snout 

 3^ to 4 in head; eye 3^ to 3^; maxillary 3i to 3f ; interorbital ^ 

 to 3|; length 35 to 39 mm. 



Closely related to Odontostilbe fugitiva Cope- with which it agrees 

 in many characters. It appears to differ, however, in the prolonged 

 dorsal and paired fins. 



{Apin'avw^, curved scimetar; with reference to the long curved simple 

 rays of the dorsal and ventral fins.) 

 Aphyooharax avary sp. nov. Fig. 8. "Avary." 



Head 3|; depth 4^; D. iii, 9, i; A. iii, 14, i; P. i, 13; V. i, 7; 

 scales 38 in median lateral series to caudal base and 4 more on latter; 

 11 tubes in 1. 1.; 11 scales transversely between dorsal origin and 

 ventral origin; 19 predorsal scales; head width If its depth; head 

 depth at occiput If; first branched dorsal ray l\; first branched 

 anal ray If; least depth of caudal peduncle 2|; pectoral \\; ventral 

 If; snout 4 in head measured from upper jaw tip; eye 3f ; maxillary 

 3; interorbital 2f. 



Body elongate, rather slender, compressed, fusiform, greatest 

 depth at dorsal origin, and edges mostly evenly convex, except short 

 and obsolete median keel in posterior half of predorsal and another 

 in same region of preventral. Caudal peduncle well compressed, 

 its least depth \\ in its length. 



Head small, profiles similarly convex, compressed and flattened 

 sides but slightly constricted below. Snout short, convex over 

 surface and in profile, and its length about f its width. Eye large, 

 rounded, high, and its centre about first f in head. Pupil large, 

 rounded. Eyelid free and not adipose-like. Mouth moderate, 

 broad. Lips fleshy, firm, little free. Maxillary long, slender, free, 

 well inclined, and reaches back opposite front pupil edge. Teeth 

 in jaws small, rather slender, conic, uniserial, and each usually with 

 very small or obsolete pointed basal cusp. Maxillary with about 

 4 more or less concealed small uniform simple conic teeth along its 

 upper front edge. Tongue moderately long, rather pointed, de- 

 pressed, free in front. Inner buccal folds rather narrow. Mandible 

 moderately protruded beyond snout tip in front, rather shallow, and 

 rami but little elevated inside mouth. Nostrils large, together, 

 within last half of snout length, anterior simple pore and posterior 



» Proc. Amer. Philos. Soc, Phila., XI, 1871, p. 566, fig. (teeth). Pebas, Ecuador. 



