192 FISHES OF WESTERN SOUTH AMERICA 
Eigenmann and EKigenmann, 1889, Proc. Cal. Aead. Sci., (2), II, 46; 
Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 442; 
Regan, 1904, Trans. Zool. Soe. London, XVII, 247; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 410. 
Oriental Peru to elevations of 6000 feet 
15417, 6, 86-153 mm., Rio Tingo, Hudnuco, over 6000 feet, Allen, October, 1918. 
15418, many, 42-137 mm., Huancachupa creek, Hudnuco, Allen, October, 1918. 
17832, 2, 75 and 82 mm., Rio Huallaga, Hudnuco, Allen, October, 1918. 
17833, 2, 55 and 65 mm., Rio Urubamba, Pueblo Urubamba, Eigenmann, November, 1918. 
17834, 6, 34-60 mm., Rio Urubamba, Santa Ana, Eigenmann, November, 1918. 
Naked part of snout tumid, densely covered with papillae, somewhat larger 
than the largest ones on the lips, snout projecting much beyond mouth by reason 
of the underlying cushion of connective and serous tissues; mouth wide, equals 
snout, and nearly equals the pectoral spine. 
Base of dorsal longer than its distance from the tip of the adipose fin. 
Mandibular ramus equals interorbital; eye 3 in interorbital, the latter 3 in the 
head. 
Scutes armed with spinules directed backward, those of the edge of each scute 
forming rows which outline the scutes in a bright, golden-amber light; spinules of 
the fins longer than those of the scutes except for the anal fin. 
Uniformly dark, or with shadow spots on the trunk. Caudal in young with 3 
series of spots forming cross bands; 5 or 7 less regular series in the adult; dorsal 
with 6-12 alternating light and dark areas on the rays, the number increasing with 
age; lower fins uniform or but slightly spotted. 
The Rio Tingo specimens, 15417, exhibit the following scutation: D. 18 scutes 
3 
25 +1 2441 
2 1 : 
The Santa Ana specimens, 17834, are of more depressed form, depth at pectoral 
girdle being only ? that of the specimens from Pueblo Urubamba of the same 
river, and of those from the Huallaga. 
181. CHAETOSTOMA LINEOPUNCTATA Eigenmann and Allen, sp. nov. 
Plate VI, fig. 1 
15373, 2, 52 and 143 mm., the larger the type, Rio Azupizti, Allen, July, 1920. 
D. 1, 8; A. I, 5. head 40 mm.; depth 20 mm.; length to base of caudal plates 
13 mm.; snout 26 mm., eye 5 mm., postorbital part of head 10 mm., interorbital 
10.5 mm., width of head 41 mm., mandibular ramus 13 mm.; width at origin of 
ventrals 833 mm.; depth of caudal peduncle 15 mm., its length 32 mm.; pectoral 
spine 36 mm.; outer ventral ray 31 mm.; upper caudal ray 34 mm., dorsal spine 
29 mm., base of dorsal fin 31 mm., distance of the snout to the origin of the dorsal 
fin 46 mm.; scutes 25 + 1. 
Broad, flat below, but little elevated at any point; naked part of snout rather 
narrow; interopercle with 3—4 short spines; last dorsal ray not adnate, Just reaching 
