378 Annals of the Carnegie Museum. 



teeth in bands in each jaw of about uniform depth; abdominal portion 

 of body deeper than the caudal; eyes without very distinctly free 

 margins; adipose about 3.66 in length of body; predorsal region only 

 slightly arched and little depressed; snout rounded; jaws about equal, 

 upper slightly the longer; in some of the alcoholic specimens parts of 

 the head are almost bare, bony or granular; barbels all short and terete; 

 maxillary barbels not reaching past the base of dorsal; postmental 

 barbels not reaching the base of pectoral and the mental barbels not 

 reaching half-way to the base of the pectorals; color about the same as 

 Rhamdia quelen, brownish, with darker brown spots and blotches, and 

 the tips of all of the fins dark; no lateral band. 



This species is easily distinguished from Rhamdia quelen by its 

 shorter rounded barbels, shorter adipose, and shorter body in com- 

 parison to length of head. 



No. 2853 (collector's number 221 1), from Rio Iguassu, Dec. 30, 1908, 

 is called "bagre amarilla" because it is yellow in life. It has eleven 

 anal rays; adipose 3.33 in length of body; eye 3 in snout; mental 

 barbels slightly longer than typical specimen from the creek. I name 

 this species in honor of Dr. J. C. Branner, who kindly assisted me at 

 the beginning of my long journey. 

 3a. Rhamdia branneri voulezi, var. nov. (Plate LXXVI.) 



Type, No. 2854 (collector's number 2179), 12.2 cm., from> Porto 

 Uniao da Victoria, Rio Iguassu, Dec. 27, 1908. Larger than the typi- 

 cal specimens of R. branneri and the dorsal with I. 7 rays. It is almost 

 white in color, with a much longer occipital process, which, however, 

 does not cjuite reach the dorsal plate; the dorsal fin is higher and the 

 pectoral spine longer than in the other specimens. I consider these 

 differences sufficient to make this a variety, which I call voulezi, in 

 remembrance of Mr. Antonio Voulez, a Frenchman of Serrinha Par- 

 ana, who in various ways assisted me, even to catching some of the 

 specimens. The postmental barbels of this variety reach past the 

 base of the pectoral and the maxillary barbels reach almost to the 

 origin of the adipose. The only example is 12.2 cm. long. 



Two other large specimens, Nos. 2855a-&, from Porto Uniao da 

 Victoria, show different color-patterns, one being lead-color and the 

 other having a white ventral, which gradually changes into a uniformly 

 dark dorsal. All agree in having shorter barbels, and rather large eyes, 

 but the four last mentioned specimens have a slightly freer margin to 

 their eyes; all have a thick, rounded two-lobed caudal, which is not 



