FISHES OF THE FAMILY LORICARIIDZ. 295 
the lateral keels sharp. Lower surface of head naked except for the marginal plates 
and a group of 2 or 3 plates, contiguous to the marginal plates, in front of each gill- 
opening; abdomen covered with small irregular plates which are more numerous 
anteriorly ; a lateral series of 8-10 plates between pectoral and ventral. First dorsal 
ray equal to 3—} the length of head; pectoral spines barely reaching base of ventral ; 
upper caudal ray elongate. Breadth of body at level of first anal ray 4 times in the 
distance from that point to the caudal. Upper surface of head with dark vermiculating 
lines; dorsal, pectoral, and caudal with small dark spots. 
Total length 175 mm. 
Three specimens from Xeberos, Upper Amazon. 
39. LORICARIA LATICEPS, sp. n. (Plate XX. fig. 1.) 
Head as broad as, or a little broader than long, its length 43-4} times in the total 
length. Diameter of eye 10-11 times in the length of head, interorbital width 
53-6 times, length of snout 13-14 times. Orbit with a shallow notch ; supraoccipital 
with a pair of weak keels; snout laminar, with a slightly produced and rounded apex ; 
upper jaw with 6 or 7 small teeth on each side, lower jaw with 9 or 10; lower 
lip with long fringes; barbel extending to the outer angle of the gill-opening. 
32-33 scutes in a longitudinal series, 14-15+17-19, all in front of the dorsal 
distinctly carinate, the lateral keels sharp. Lower surface of head naked except for 
the marginal plates, the space in front of the gill-opening not covered with plates ; 
abdomen covered with small irregular plates which are more numerous anteriorly; a 
lateral series of 6—7 plates between pectoral and ventral. First dorsal ray equal to 4 
the length of head; pectoral spine barely reaching base of ventral; upper caudal ray 
very elongate. Breadth of body at level of first anal ray 33-3} times in the distance 
from that point to the caudal. Upper surface of head and body with dark lines or 
series of small spots, mostly radiating on the head, transverse on the body. Dorsal, 
pectoral, and caudal with small dark spots. 
Total length 220 mm. 
Two specimens from Paraguay, collected by Dr. Ternetz, had been referred by 
Boulenger to Z. lamina in his account of the Ternetz collection. They are, however, 
distinguished from that species by the broader head and body, less obtuse snout, 
narrower interorbital width, more distinct keels on the supraoccipital and on the 
scutes in front of the dorsal, fewer abdominal plates, and by the absence of plates on 
the lower surface of the head in front of the gill-opening. 
40. fLOoRICARIA PLATYCEPHALA. 
Hemiodon platycephalus Kner, Denkschr. Ak. Wien, vi. 1854, p. 89, pl. vi. fig. 2. 
Loricaria platycephala Giinth. Cat. Fish. v. p. 258 (1864). 
Very similar to L. daticeps, but with a somewhat longer and more broadly rounded 
VOL. XVII.—PakT 11. No. 14.—October, 1904. 2k 
