286 MEMOIRS OF THE CARNEGIE MUSEUM 



Allied to P. trifasciatus. 



Head 3.75; depth 4.66-4.75; D. 10; A. 9 or 10; five scales between dorsal and 

 ventral, ten before dorsal, twenty-six in a median line. Eye equal to snout and to 

 interorbital, 3.2 in the head; jaws equal. 



Dorsal over the vertical from the ventrals; pectorals reaching half-way to 

 middle of ventrals; ventrals half-way to middle of anal; adipose fin a little anterior 

 to the tip of the last anal ray; origin of anal on a vertical from the tip of the last 

 dorsal raj'. 



Back light brown, margined by a more or less faint darker line; a light streak ' 

 from snout through top of iris to upper half of middle of caudal; a conspicuous 

 lateral black band from mandible to base of lower caudal lobe, continued on the rays 

 just below the middle; a dark streak from behind the base of the lower pectoral 

 rays to and along base of the anal ; middle anal rays dusky. Ventral surface silvery. 



In life a blood-red streak borders the superior margin of the black lateral band 

 over the middle of the pectorals; a red spot on basal half of the dorsal, two red 

 spots on base of the caudal, one similar spot on the anal lobe; an orange spot on 

 each ventral fin. 



143. Pcecilobrycon ocellatus Eigenmann. (Plate XXXVII, fig. 4.) 

 Pcecilobrycon ocellatus Eigenmann, Ann. Carnegie Mus., VI, 1909, 45; Repts. 



Princeton Univ. Exp. Patagonia, III, 1910, 427. 



Type, 41 mm. Wismar. (Carnegie Museum Catalog of Fishes Xo. 1179.) 



Cotypes, two specimens, 39-41 mm. Wismar. (I. U. Cat. Xo. 11703.) 



Cotypes, seventy-one specimens, 35-43 mm. Rockstone sand-bank. (C. M. 

 Cat. Xo. 1181a-./; I. U. Cat. Xo. 11704.) 



Cotypes, nine specimens, 33-42 mm. Cluck Island. (C. M. Cat. Xo. 

 1181a-c; I. U. Cat, Xo. 11705). 



Cotypes, eight specimens, 31.5-37 mm. Rupununi Pan. (C. M. Cat, Xo. 

 118a-c; I. U. Cat. Xo. 11706.) 



Cotype, one specimen, 39 mm. Crab Falls. (C. M. Cat. Xo. 1183a.) 



Cotypes, two specimens, 39-42 mm. Tumatumari. (C. M. Cat, Xo. 1184a; 

 I. U. Cat, Xo. 11707.) 



Cotypes, eighteen specimens, 31-43 mm. Konawaruk. (C. M. Cat. Xo. 

 1185a-e; I. U. Cat. Xo. 11708.) 



Most nearly related to P. unifasciatus Steindachncr. 



Head 4.2-4.4; depth 5.4-5.5; D. 10; A. 10 or 11; five scales between dorsal 

 and ventral, ten before dorsal, twenty-eight along a lateral series. Eye a little 

 shorter than snout, 3.3 in the head, equal to the interorbital. Upper jaw projecting. 



