424 PROCEEDINGS OF THE ACADEMY OF [May, 



Dorsal origin inserted about midway between snout tip and caudal 

 base, first branched ray largest (now a little damaged terminally), 

 and apparently a little longer than head, depressed back slightly more 

 than half way to caudal base. Adipose fin inserted trifle after last 

 third in space between last dorsal ray base and caudal base, fin slender, 

 about If to caudal base. Caudal (damaged) evidently emarginate. 

 Anal inserted nearly opposite dorsal origin, anterior or first branched 

 ray longest, base of fin long and all other rays low. Pectoral inserted 

 low, rather long, upper rays longest, pointed, and falling little short 

 of anal origin. Vent close before anal. 



Color when fresh in rum pale brownish, nearly ecru, sides and below 

 silvered whitish. Scales along edge of back and above dusted 

 rather inconspicuously with dull dusky. A leaden streak from 

 shoulder to caudal base, where it resolves in an ill-defined dusky 

 spot a little larger than pupil, but not so large as eye. Another 

 spot at shoulder, where leaden streak begins, a little smaller than 

 caudal spot, and paler or leaden in color. Dorsal and caudal pale 

 olivaceous-ecru, and anal similar though still paler. Pectoral very 

 pale or whitish. Iris deep brown, tinged reddish. Head pale brown 

 above, sides and below burnished bright silvery- white. Lips pale 

 brownish. Peritoneum showing through abdominal walls as whitish. 



Length If inches (caudal tips damaged). 



Type No. 37,867, A. N. S. P. Corisal, Venezuela. February 27th, 

 1911. F. E. Bond and Stewardson Brown. 



Only the above, a small example, taken in a pail from a small 

 stream, along with the types of Phenacogaster hondi. It is now in 

 rather poor preservation. 



(Named for Mr. Stewardson Brown.) 



SERRASALMIN.E. 

 Pygooentrus stigmaterythraeus sp. nov. Fig. 3. 



Head 2f; depth If; D. ii, 15, i; A. hi, 27, i; P. i, 15; V. i, 6; 

 scales in 1. 1. according to tubes 80 + 9; scales above 1. 1. along its 

 course 102 + 12; 40 scales above 1. 1. to dorsal origin; 48 scales below 

 1. 1. to ventral origin; 38 scales below 1. 1. to anal origin; predorsal 

 scales about 57; head width about If its length; head depth at occiput 

 about lyV; mandible 2\; first branched dorsal ray (tip damaged now) 

 about If ?; third simple anal ray 2\; least depth of caudal peduncle 

 3^; upper caudal lobe (tip damaged) about If?; lower caudal lobe 

 (tip slightly damaged) about 1^; pectoral 1^; ventral 2+; snout 3f in 

 head measured from upper jaw tip; eye 4f; maxillary 2^; inter- 

 orbital 2|-. 



