NEW SOUTH-AMERICAN FISHES. 669 



about 7 ill length of head, interorbital width 2|, length of snout 

 2 to 2-1-. Occipital region evenly convex, without crests. Scutes 

 spinulose, not carinate, 22 to 24 in a longitudinal series. Lower 

 surface of head with a naked area in front of clavicles ; abdomen 

 with 4 or 5 irregular series of plates between the lateral series. 

 Dorsal I 7 ; origin a little behind base of pelvics, but not much 

 nearer to end of snout than to base of caudal. Anal I 5. Pectoral 

 spine extending beyond middle of ventral. Caudal emarginate. 

 Caudal peduncle 3 times as long as deep. Fins with series of 

 dark spots. 



Four specimens, 30 to 35 mm. in total length, from the La 

 Plata, presented in 1909 by Herr J. Paul Arnold. 



8. OXYLORICARIA TAMAN^, Sp. 11. (PL LXXVII. figs. I, I a, I h.) 



Head 5^ in the length. Breadth of head 1| ( d ) or 1^ ( $ ) in 

 its length, diameter of eye 7 to 8, interorbital width 3-J, length of 

 snout 1|-. Snout without distinct rostrum ; supraorbital edges 

 not or scarcely raised ; sides of the snout, in the male, with 

 bristles. 32 or 33 scutes in a longitudinal series (14-15 + 18) ; 

 lateral keels weak, obsolete anteriorly, united posteriorly. A 

 naked area surrounding the lips ; abdomen postei'iorly with 3 series 

 of plates between the lateral series ; an anal plate bordered 

 anteriorly by 3, these 3 again by 5. Dorsal elevated, its height 

 5 the length of the fish ; pectoral spine extending to anterior -^ 

 of ventral ; caudal emarginate, the outer rays produced. Breadth 

 of body at level of last anal ray 4| to 5 in the distance from 

 the caudal. Anterior half of dorsal blackish ; caudal blackish at 

 the base ; pectoi-al blackish, pelvics more or less dusky, anal 

 spotted anteriorly. 



Two examples (c? , 2 ), 225 and 200 mm. in total length, from 

 the Rio Tamana, Rio San Juan, Choco, S.W. Colombia (200 ft.), 

 collected by Mr. G. Palmer. 



9. OXYLORICARIA LEIGHTONI, Sp. n. (PI. LXXYIL fig. 2.) 



Head 4| in the length. Breadth of head 1| to 1 1 in its length, 

 diameter of eye 8, intei^orbital width 3-g- to 3|, length of snout 14 

 to 2. Snout without distinct rostrum ; supraorbital edges not or 

 scarcely raised. 30 scutes in a longitudinal series (15 + 15) ; lateral 

 keels weak, united posteriorly. A naked area surrounding the 

 lips ; abdominal plates posteriorly forming 3 or 4, anteriorly 6 or 7, 

 irregular series between the lateral series ; an anal plate bordered 

 anteriorly by 3. Height of dorsal equal to length of head ; pectoral 

 spine extending to antei-ior ^ of ventral ; caudal emarginate, the 

 outer rays produced. Breadth of body at level of last anal ray 

 -I- the distance from caudal. Fins with blackish spots ; anterior 

 part of dorsal blackish at base and near tip. 



Two specimens, 55 and 65 mm. in total length, from 

 Honda, Colombia (300-400 ft.), presented in 1909 by Sir Bryan 

 Leighton. 



