168 Annals of the Carnegie Museum. 



reaching beyond the origin of the ventrals. Pores of lateral line (in 

 only two scales. Scales regularly imbricate, no interpolated rows; 

 caudal and anal naked; axillary scale minute. Scales of sides outlined 

 in dark, a dusky spot over the scales with developed pores. 



Glandulocauda gen. now 

 (Type Glandulocauda melanogenys sp. now) 



Allied to Bryconamericus, Ccelurichthys, and Hyphessobrycon. 

 Premaxillary with two distinct series of teeth. Four, rarely five, 

 teeth in the inner series of the premaxillary; second preorbital cover- 

 ing the entire cheek; caudal naked, a few scales forming a flap on the 

 base of the rays just above the middle of the fin; lateral line short" 

 adipose fin present; origin of dorsal nearer middle caudal rays than 

 to snout. 



Species of Glandulocauda. 

 a. Much compressed, deep; depth of caudal peduncle greater than its length; origin 

 of anal and dorsal about equidistant from snout. 

 b. A. 26; scales 8-40-7 or 8; teeth five-pointed; cheeks dark; lateral line with 



eleven to seventeen pores melanogenys. 



bh. A. 27-33; scales 7-38-6; teeth three-pointed; cheeks silvery; lateral line with 



six or seven pores inequalis. 



aa. Less compressed; depth of caudal peduncle less than its length; origin of dorsal 

 in advance of that of the anal; A. about 20; depth 3.33; scales 5-33-5; 

 lateral line with 5-7 pores melano pleura. 



4. Glandulocauda melanogenys sp. nov. 

 Plate V, fig. 6. 



Type. — One specimen, 49 mm. C. M. No. 3553. Alto da Serra, Sao Paulo, 

 July 25, 1908. 



Cotypes. — Twenty-one specimens, 29 to 51 mm. C. M. No. 3554. Same place 

 and date. 



Head 4; depth 2.75-3.33; D. 10; A. 26; scales 8-40-7 or 8; eye in 

 adult 3 in head, equal to the interorbital. Compressed, deep in 

 adult, more elongate in young; preventral area rounded, without 

 a distinct median series of scales; predorsal area narrowly rounded> 

 with about fifteen scales in a median series. Head smooth, rounded 

 above; frontal fontanel considerably narrower and shorter than the 

 parietal; second suborbital in contact wdth the preopercle along its 

 entire lower margin, with a naked interspace behind; premaxillary - 

 maxillary border, with a slight angle, 2.5 in the head; lower jaw 



