566 PROCEEDINGS OF THE ACADEMY OF [Oct.^ 



Color in alcohol pale brownish generally, paler below. Head 

 dusky above, cheek and opercle dusted with dark dots, and lower 

 surface pale or whitish. Iris slaty. Lips dusky, also dusky blotch 

 on each side of mandible in front. Median dusky streak down back. 

 Dusky humeral blotch less than pupil in size. Lateral vertebral 

 blackish streak, becoming more intense behind till it merges with 

 dusky blotch at caudal base, latter reflected out on rays of caudal 

 basally so that it appears but little smaller than eye. Fins all pale. 



Length 18 mm. 



Type, No. 39,305, A. N. S. P. Tributary of the Rio Madeira 

 near Porto Velho, Brazil. January-February, 1913. Edgar A. Smith. 



No. 39,306, A. N. S. P., paratype, same data. 



Four examples from Igarape de Candelaria, a tributary of the 

 Madeira River, though at a point two miles distant, in Lat. S. 8° 45', 

 Long. W. 63° 54', Brazil. September, 1912. Edgar A. Smith. 



Two examples from the Madeira River, about 200 miles east of 

 Long. W. 62° 20', Brazil. September, 1912. 



These specimens are all small and agree with the type, so far as^ 

 I can compare them. 



(Named for the Madeira River.) 



Charax sardina sp. nov. "Sardinha." Fig. 21. 



Head 3i; depth 3f ; D. ii, 9; A. iv, 31, i; P. i, 14; V. i, 7; scales 

 70 in 1. 1. to caudal base and 5 more on latter; about 12 scales between 

 dorsal origin and 1. 1.; 10 scales below 1. 1. to ventral origin; 12 scales 

 below 1. 1. to anal origin; about 22? predorsal scales; head width 2f 

 in its length; head depth at occiput If ; snout 3j; eye3f; maxillary 

 If; interorbital 3f, first branched dorsal ray 1|; first branched anal 

 ray 1|; least depth of caudal peduncle 3^; upper caudal lobe 1|; 

 pectoral 1|; ventral If. 



Body elongate, compressed, slenderly ovoid in contour, deepest 

 at dorsal origin, profiles similar, postventral a little trenchant, and 

 other edges convex. Caudal peduncle compressed, about long as 

 deep. 



Head triangular in profile, attenuated, lower profile little more 

 convex, compressed, and flattened sides slightly constricted below. 

 Snout conic, somewhat depressed above and a little shorter than 

 broad. Eye rounded, well elevated, and its centre near first f in 

 head. Pupil moderate, rounded. Eyelids free, not adipose-like. 

 Mouth large, well inclined, opens in front level with middle of eye, 

 completely closing. Lips thin, firm, little developed. Maxillary 

 greatly inclined, largely free and expanding below until about 2| 



