258 MR. C. TATE REGAN ON THE 
10. XeENOCARA MONTANA, sp. n. (Plate XIV. fig. 6.) 
Depth of body 6 times in the total length, length of head 2} times. Head 12 times 
as long as broad and 2} times as long as deep. Diameter of eye 10 times in the length 
of head, length of snout 12 times, interorbital width 3 times. Length of mandibular 
ramus twice in the interorbital width. Snout with tentacles. Interoperculum armed 
with about 14 spines, the longest about 5} times in the length of head. 24 scutes 
in a longitudinal series, 7 between dorsal and adipose fin, 11 between anal and caudal. 
D. 17, the first ray 3 the length of head, the last, when laid back, separated by 
2 scutes from the spine of the adipose fin; length of base of dorsal nearly equal to its 
distance from the adipose fin. A.I4. Pectoral spine scarcely extending to ventral. 
Caudal peduncle 2} times as long as deep. Olivaceous, the fins blackish, slightly 
mottled with lighter. 
Total length 100 mm. 
One specimen from Tumupara, Andes of Bolivia, 1500 feet, collected by Dr. J. 
W. Evans. 
11. XENOCARA BUFONIA. 
Hypostomus bufonius Cuy. & Val. Hist. Nat. Poiss, xv. p. 511 (1840). 
Hypostomus calamita Cuy. & Val. t.c. p. 514. 
Chetostomus calamita Giinth. Cat. Fish. v. p. 248 (1864). 
Chetostomus jelskii Steind. Sitzb. Ak. Wien, Ixxii. 1875, p. 603. 
Ancistrus calamita Eigenm. & Eigenm. Proc. Cal. Ac. (2) ii. 1889, p. 48; Occ. Pap. Cal. Ac. i. 
1890, p. 449. 
Depth of body 52-6 times in the total length, length of head about 3 times. Head 
nearly as broad as long and twice as long as deep. Diameter of eye 7—9 times in the 
length of head, length of snout 13-2 times, interorbital width 2}-2} times. Length 
of mandibular ramus 14-12 times in the interorbital width. Snout with tentacles. 
Interoperculum armed with 12-16 spines, the longest about 4 times in the length 
of head. 25-26 scutes in a longitudinal series, 7 between dorsal and adipose fin, 
12-13 between anal and caudal. D. I 7, the first ray about 3 the length of head, the 
last, when laid back, separated by 2-3 scutes from the spine of the adipose fin; Jength 
of base of dorsal nearly equal to its distance from the adipose fin. A.I4. Pectoral 
spine nearly or quite extending to base of ventral. Caudal obliquely truncate, the 
lowest ray about as long as the head. Caudal peduncle 25-2) times as long as deep. 
Olivacecus ; fins with dark spots or cross-bars. 
Total length 155 mm. 
Sixteen specimens (including the types of the species and of H. calamita): Andes of 
Peru and Bolivia. 
