FISHES OF THE FAMILY LORICARIIDA. 299 
keels very weak and obtuse, the scutes otherwise not carinate. Lower surface of head 
naked except for a granular plate in front of each gill-cleft ; abdomen covered with 
numerous small granular plates, arranged in 8-10 irregular series between the lateral 
series ; posterior plates somewhat larger and fewer; a pair of rather large anal plates. 
First dorsal ray nearly twice as long as the head; pectoral spine extending beyond 
middle of ventral; caudal deeply emarginate. Brownish; some dark spots on the 
dorsal and caudal. 
Total length 185 mm. 
Two specimens: Surinam. 
3. FOXYLORICARIA BREVIROSTRIS. 
Loricaria brevirostris Eigenm. & Eigenm. Proc. Cal. Ac. (2) ii. 1889, p. 35. 
Diameter of eye 7 times in the length of head, interorbital width 34 times, length 
of snout nearly twice. Snout pointed; supraorbital edges slightly raised; sides of 
the head, in the male, with short bristles. 34 scutes in a longitudinal series, 19+15; 
lateral keels weak, completely united posteriorly; scutes otherwise not carinate. 
Lower surface of the head covered with numerous small irregular plates ; abdomen 
with 3 series of plates between the lateral series. First dorsal ray longer than the 
head. Dorsal and caudal with dark spots on the rays. 
The type, from Iga, Peru, measures 210 mm. to the base of caudal. 
4, OXYLORICARIA GUENTHERI, sp.n. (Plate XVIII. fig. 1.) 
Loricaria rostrata (non Spix) Giinth. Proc. Zool. Soc. 1868, p. 235; Eigenm. & Eigenm. Proc. 
Cal. Ac. (2) 11. 1889, p. 35, and Occ. Pap. Cal. Ac. i. 1890, p. 366. 
Length of head 43 times in the total length. Breadth of head 12 times in its 
length, diameter of eye 73 times, interorbital width 34 times, length of snout 1+ times. 
Snout with a projecting rostrum; supraorbital edges not raised ; sides of the head, in 
the male, with bristles of moderate length. 36 scutes in a longitudinal series, 20+-16 ; 
lateral keels weak, obsolete anteriorly, completely united posteriorly ; lower surface of 
head with small plates, except an area which is covered by the lower lip; abdomen 
with 3 series of plates between the lateral series; an anal plate, bordered anteriorly 
by 3, these 3 again by 5. Length of first dorsal ray 5} times in the total length. 
Pectoral spine extending slightly beyond the base of ventrals. Caudal emarginate, 
the outer rays produced. Breadth of body at level of last anal ray 42 times in the 
distance from the latter to the caudal. Uniformly olivaceous. 
Total length 230 mm. 
One specimen from Xeberos, Upper Amazon. This species has also been recorded 
from Manacapuru, Middle Amazon. 
