FISHES OF THE FAMILY LORICARIIDA, 315 
originating below the first dorsal ray, extending to the anal opening ; adipose fin long, 
well developed, without trace of spine. Distance from tip of snout to base of first 
dorsal ray about 22 times in the total length, from base of last anal ray to the caudal 
about 4% times. Body spotted or marbled with dark violet. 
The typical examples described and figured by Dr. Steindachner measure up to 
180 mm. in total length. 
Rio Huambo and Rio Totora, Peru. 
13, ARGES SABALO. 
Arges sabalo Cuy. & Val. Hist. Nat. Poiss. xv. p. 335, pl. 444 (1840) ; Giinth. Cat. Fish. v. p 222 
(1864) ; Steind. Sitzb. Ak. Wien, Ixxii. 1876, p. 598 (part.), and Denkschr. Ak. Wien, xlvi. 
1882, p. 17, pl. iv. fig. 2. 
Length of head 3} times in the total length. Interocular width less than the distance 
from eye to posterior nostril, 42-42 times in the length of head. Outer series of teeth 
of the premaxillaries unicuspid ; mandibulary teeth bicuspid; barbel extending 2-3 of 
the distance from its base to the gill-opening. First dorsal ray equal to ? the length 
of head; pectoral spine extending to middle of ventral: ventrals originating below the 
first ray of dorsal, extending to the anal opening; adipose fin long, well developed, 
without trace of spine. Distance from tip of snout to base of first dorsal ray 23-22 
times in the total length, from base of last ray of anal to the caudal 5 times. Body 
marbled with dark brown; fins with dark spots. 
The typical example described and figured by Dr. Steindachner is 200 mm. in total 
length. I have examined one small specimen, 55 mm. in total length, from Rozmaiu, 
Upper Peru, which differs only in the somewhat longer barbel. 
14. ARGES TACZANOWSKI. 
Arges sabalo (part.) Steind. Sitzb. Ak. Wien, Ixxii. 1876, p. 598. 
Arges taczanowski Bouleng. Proc. Zool. Soc. 1890, p. 451, pl. xli. fig. 1. 
Length of head 4 times in the total length. Interocular width much less than the 
distance from eye to posterior nostril, 44 times in the length of head. Outer series of 
teeth of the premaxillaries unicuspid ; mandibulary teeth bicuspid; barbel extending 
to the gill-opening. First dorsal ray equal to + the length of head; pectoral spine 
extending to posterior 4 of ventral; ventrals originating nearly below the first dorsal 
ray, extending a little more than 3 of the distance from their base to the anal opening. 
Adipose fin long, well developed, without trace of spine. Distance from tip of snout 
to base of first dorsal ray 22 times in the total length, from base of last anal ray to the 
caudal 5 times. Yellowish, marbled with purplish brown. 
Total length 84 mm. 
One specimen from Amable Maria, Peruvian Andes. 
