FISHES OF THE FAMILY LORICARIID®. 24: 
ev] 
2. PANAQUE DENTEX. 
Chetostomus dentex Giinth. Proe. Zool. Soc. 1868, p. 233. 
Panaque dentex Eigenm. & Eigenm. Proc. Cal. Ac. (2) ii. 1889, p. 44, and Oce. Pap. Cal. Ac. 1. 
1890, p. 427. 
Depth of body 5 times in the total length, length of head 3 times. Head 12 times 
as long as broad and 1} times as long as deep. Diameter of eye 5 times in the length 
of head, interorbital width 22 times, length of snout 12 times. Both jaws with 4 or 0 
teeth on each side. Snout narrowed anteriorly, supraorbital edges moderately raised ; 
supraoccipital nearly flat, without median ridge, its posterior edge slightly convex, 
with scarcely distinct median point; temporal plates not carinate ; interoperculum 
9 
armed with some slender spines, the longest equal to 3? the length of head. Seutes 
spinulose, not distinctly carinate, 26 in a longitadinal series, 6 between dorsal and 
adipose fin, 12 between anal and caudal. Supraoccipital bordered posteriorly by a 
median scute and one on each side. Lower surface of head and abdomen (in the 
young) in great part naked. D.17; length of base of dorsal equal to its distance 
from the middle of spine of adipose fin. A.14. Pectoral spine extending to anterior 
¢ of ventral. Caudal emarginate. Caudal peduncle 22 times as long as deep. 
Olivaceous. 
Total length 85 mm. 
One specimen: Xeberos, Upper Amazon. 
3. PANAQUE GIBBOSUS. 
Chetostomus cochliodon (sive gibbosus) Steind. Sitzb. Ak. Wien, Ixxx. 1879, p. 187; Denkschr. Ak. 
Wien, xlii. 1880, p. 63, pl. iv. fig. 1. 
Panaque cochliodon Kigenm. & Eigenm. Proc. Cal. Ac. (2) ii. 1889, p. 41, and Oce. Pap. Cal. Ac. i. 
1890, p. 427. 
Depth of body about 43 times in the total length, length of head about 22 times. 
Head about 1; times as long as broad and 1? times as long as deep. Diameter of eye 
9 times in the length of head, interorbital width twice, length of snout 12 times. Both 
jaws with about 8 teeth on each side. Snout somewhat narrowed anteriorly ; supra- 
occipital elevated and arched, with a nearly straight transverse posterior edge ; inter- 
operculum armed with some slender spines, the longest equal to 4 the length of head. 
Scutes spinulose, not distinctly carinate, 26 in a longitudinal series, 6 between dorsal 
and adipose fin, 12 between anal and caudal; supraoccipital entirely bordered posteriorly 
by a single scute ; lower surface of head and abdomen completely covered with small 
granular scales. D.17; length of base of dorsal nearly equal to its distance from tip 
of spine of adipose fin. A.I 4. Pectoral spine extending to middle of ventral. 
Caudal strongly emarginate. Caudal peduncle 3 times as long as deep. Uniform greyish. 
Total length 180 mm. 
One specimen: Colombia (R. Cauca). 
