FISHES OF THE FAMILY LOKICAKIID^E. 243 



2. Panaque dentex. 



Chat ostomy s dentex Giinth. Proc. Zool. Soc. 18G8, p. 233. 



Panaque dentex Eigenm. & Eigenm. Proc. Cal. Ac. (2) ii. 1889, p. 44, and Occ. Pap. Cal. Ac. i. 

 1890, p. 427. 



Depth of body 5 times in the total length, length of head 3 times. Head 1-| times 

 as long as broad and If times as long as deep. Diameter of eye 5 times in the length 

 of head, interorbital width 2f times, length of snout If times. Both jaws with 4 or 5 

 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 

 armed with some slender spines, the longest equal to |- the length of head. Scutes 

 qfinulose, not distinctly carinate, 2fi in a longitudinal series, 6 between dorsal and 

 adipose fln, 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. 1 7 ; length of base of dorsal equal to its distance 

 from the middle of spine of adipose fin, A. I 4. Pectoral spine extending to anterior 

 J of ventral. Caudal emarginate. Caudal peduncle 2f times as long as deep. 

 Olivaceous. 



Total length 85 mm. 



One specimen : Xeberos, Upper Amazon. 



3. Panaque gibbosus. 



Chcetostomus cochliodon (she gibbosus) Steind. Sitzb. Ak. Wien, lxsx. 1879, p. 187; Denksclir. Ak. 



Wien, xlii. 1880, p. 63, pi. iv. fig. 1. 

 Panaque cochliodon Eigenm. & Eigenm. Proc. Cal. Ac. (2) ii. 1839, p. 44, and Occ. Pip. Cal. Ac. i. 



1890, p. 427. 



Depth of body about i.\ times in the total length, length of head about 2| times. 

 Head about \\ times as long as broad and If times as long as deep. Diameter of eye 

 9 times in the length of head, interorbital widch twice, length of snout If 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 f the length of head. 

 Scutes spinulose, not distinctly carinate, 20 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. I 7 ; 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). 



