540 PROCEEDINGS OF THE ACADEMY OF [Oct., 



up of crowded dusky or blackish dots. Behind and in front a pale 

 or whitish area, more extensive and vaguely defined. Blackish 

 blotch, largely vertical, embraces caudal base. Iris whitish, though 

 marked with broad slaty-dusky vertical streak. Fins all pale, 

 marked with minute dusky dots. Belly, sides, and lower surface of 

 head silvery-white. 



Length 56 mm. 



Type, No. 39,220, A. N. S. P. Igarape de Candelaria (about two 

 miles from the Madeira River, into which it empties), in Lat. S. 

 8° 45', Long. W. 63° 54', Brazil. September, 1912. Edgar A. Smith. 



Also, Nos. 39,221 to 39,223, A. N. S. P., paratypes, same data. 

 Head 3| to 3^; depth 2; D. iii, 8, i or iii, 9, i; A. iv, 43, i to iv, 46, i; 

 scales 47 or 48 in 1. 1. to caudal base, and 2 more on latter; 12 or 13 

 scales above 1. 1.; 13 or 14 scales below 1. 1.; 13 or 14 predorsal scales; 

 snout 3f to 4 in head, measured from upper jaw tip; eye 2f to 2f ; 

 maxillary 2f to 3; interorbital 2| to 2|; length 51 or 52 mm. 



This species is apparently related to Ctenobnjcon alleni (Eigenmann 

 and Ward),^ but that species differs in having a more curved or 

 undulated predorsal profile, and much fewer anal rays (40-41). 

 The figure is from a very unsatisfactory photograph, and in no way, 

 except possibly the general profile, portrays the many characters 

 desired but omitted in the brief description. Characteristic of the 

 present species is the dark vertical streak through the eye. 



(/'a/?(5o9, streak; (^<p, eye.) 



Moenkhausia lepidura madeirae subsp. nov. Fig. 11. 



Head 3f; depth 3f;'D. iii, 9; A. iv, 19, i; P. i, 14; V. i, 7; 

 scales 34 in 1. 1. to caudal base and 3 more on latter; 6 scales above 

 1. 1.; 4 scales below 1. 1. to ventral origin; 4 scales below 1. 1. to anal 

 origin; 13 predorsal scales, 11 to occipital process; head width 1| 

 its length; head depth at occiput Ij; mandible 2|; first branched 

 dorsal ray lyV; first branched anal ray 1|; least depth of caudal 

 peduncle 2f ; pectoral 1|; ventral If; snout 3f in head measured 

 from upper jaw tip; eye 2f ; maxillary 2|; interorbital 3. . 



Body elongate, compressed, with fusiform contour, deepest at 

 dorsal origin, profiles alike, and a slight median predorsal ridge, 

 other edges rounded convexly. Caudal peduncle compressed, about 

 long as deep. 



Head moderately small, compressed, profiles similar, and flattened 



* Tetragonopterus alleni Eigenmann and Ward, Ann. Carnegie Miis., IV, 1907, 

 p. 126, PI. 40, fig. 2. Corumba, Rio Otuquis, Ascuncion, Paraguay. 



