new South- American Fishes. 625 
the simple outer ray, which is 14 times as long as the head. 
Ventrals extending to the anal opening. Caudal truncate. 
Head and body with rather large dark spots; dorsal and 
caudal dusky. 
Total length 125 mm. 
Hight specimens from Merida, Venezuela, and from the 
Rio Albireggas, above Merida, altitude 3500 metres, 
collected by Sr. S. Bricefio. 
Allied to 1. brasiliensis, Ltkn., but with a shorter head 
and more elongate body, 
Pimelodus (Pimelodella) teeniophorus. 
Depth of body 54 times in the total leneth, length of head 
Al times. Head 14 times as long as broad. Diameter of 
eye 34 times in the length of head, interorbital width 4 times. 
Snout equal in length to the postorbital part of head. Max- 
illary barbel extending to base of caudal, postmental barbel to 
extremity of pectoral. D.16, the spine slender, its length 14 
times in that of the head. Length of adipose fin about 24 times 
in the total length. A. III 8. Pectoral spine extending to 
below the third or fourth branched ray of the dorsal, stout, 
with about 12 teeth on its inner edge, the longest equal in 
length to about # the breadth of the spine. Ventrals 
originating below the last dorsal ray, extending 2—3 of the 
distance from their base to the anal. Caudal forked, the 
inner rays 4 the length of the outer. A well-developed 
black lateral stripe extending from the snout, through the 
eye, to the base of caudal. 
Total length 85 mm. 
‘T'wo specimens from Descalvados, Matto Grosso, collected 
by Dr. Ternetz, referred by Boulenger to P. lateristriga in 
his account of the Ternetz collection. This species is allied 
to P. vittatus, Ltkn., but differs in having much longer 
barbels, longer adipose fin, and longer pectoral spine. 
Pimelodus (Pimelodella) griseus. 
Depth of body 5 times in the total length, length of head 
4} times. Head 13 times as long as broad. Diameter of eye 
4 times in the length of head and equal to the interorbital 
width. Snout equal in length to the postorbital part of head. 
Maxillary barbel extending to extremity of ventral, post- 
mental barbel to middle of pectoral. D. 1 6, the spine mode- 
rately stout, nearly smooth, its length 13-13 times in that of 
the head; longest branched ray nearly as long as the head. 
Length of adipose fin nearly 4 times in the total length, 
