FISHES OP THE FAMILY LOBICARIIDyE. 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 |— | 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. Lokicaria laticeps, sp. n. (Plate XX. fig. 1.) 



Head as broad as, or a little broader than long, its length 4-§— 4|- times in the total 

 length. Diameter of eye 10-11 times in the length of head, interorbital width 

 5f-6 times, length of snout Tf-lf 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 3-§— 3-^ times in the distance 

 from that point to the caudal. Upper surface of head and body with da.rk 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 L. 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. fLORICARIA PLATYCEPHALA. 



Hemiodon jjlatyceplialus Kner, Denkschr. Ak. Wien, vi. 1854, p. 89, pi. vi. fig. 2. 

 Loricaria platycephala Giinth. Cat. Fish. v. p. 258 (1864). 



Very similar to L. laticeps, but with a somewhat longer and more broadly rounded 

 vol. xvn. — part in. No. 14. — October, 1904. 2r 



