170 Annals of the Carnegie Museum. 



anal margin hyaline, followed by dusky, which fades toward the base 

 of the fin; upper and lower margin of caudal dark. Otherw se this 

 species is very similar to melanogenys. 



(). G andulocauda melanopleura sp. now 



Plate V, fig. 7. 



Type. — One specimen, 51 mm. C. M. No. 3557. Serinha Parana, Rio Iguassu, 

 Dec. 22, 1908. 



Cotypes. — Five specimens, 35 to 44 mm. C. M. No. 3558. Same place and 

 date. 



Head 4; depth 3.33; D. 10; A. 19-20; scales 6-36-5; eye 3 in the 

 head; interorbital 2.5. Little compressed, heavy forward. Preven- 

 tral and predorsal areas rounded, the latter with about fifteen scales, 

 of which the posterior half are in a median series, the anterior paired 

 or irregularly in a median series; skull smooth; profile rounded; frontal 

 fontanel nearly circular, the parietal about four times as long as the 

 frontal; occipital process very short; second suborbital covering the 

 entire cheek, except a narrow naked strip behind; snout blunt, 

 max llary-premaxillary border without an angle, 2.3 in the head. Pre- 

 maxillary with a distinct outer series of three teeth and an inner series 

 of four teeth; maxillary with three teeth; dentary with three strongly 

 ridged large teeth, a smaller recurved one and several minute ones 

 on the sides; teeth of inner series of premaxillary five-pointed, those 

 of the outer series three-pointed. The dentary teeth are unusual, 

 inasmuch as the three points are continued in ridges so distinct that 

 the tooth has the appearance of being composed of a bundle of three 

 teeth. Gill-rakers 7 + 9, the upper ones very short. Dorsal rounded, 

 its origin about equidistant from the snout and the base of the 

 middle caudal rays; adipose fin well developed; caudal short, the lobes 

 a little over 4 in the length; anal short, scarcely emarginate; caudal 

 peduncle longer than high; ventrals scarcely or not reaching anal; 

 pectorals about to the ventrals. Scales in regular series, occasionally 

 a very large scale. No anal sheath; a lobe of scales extending on the 

 base of the rays just above the middle of the caudal, the scales 

 apparently normal. Lateral line very short. Dusky, a darker lateral 

 band; no humeral or caudal spots; base of anal dark. 



