ElGENMANN: ThE SeRRASALMIN.T. AND MyLIN^. 



247 



Habitat. — Guiana, Orinoco, Amazons, and ?Paragiiay. 

 5770 a. C. M. 158 mm. Santarem, Dec. 15, 1909. Haseman. 

 5800 a-h. C. M. About 150 and 182 mm. Manaos. Haseman. 



Head 3.66-3.75; depth to end of lateral line i. 55-1. 6; D. 16-17; 

 A. 33-35; serra^ 34 or 35; snout 1.5 in the eye; eye 3 in the head; 

 interorbital 2.16; margin of second suborbital rounded, but leaving a 

 naked area equal to one-fourth to one-third of the total width of the 

 cheeks; space between dorsal and caudal longer than head; head 1.3- 

 1.4 in the length of the anal; spots sometimes arranged in transverse 

 rows, merging into irregular cross-bands in the largest specimen. 



12. Pristobrycon emarginatus (Schomburgk). 



Salmo emarginatus Schomburgk, Fishes Brit. Guiana, Vol. I, 1841, p. 231, plate 

 19. (Locality?) 



Schomburgk's figure represents a fish shaped like P. aureus or a 

 Metynnis. It differs from the latter in having a short adipose fin. 

 It is quite possible that the figure is that of aureus. 



13. Pristobrycon calmoni (Steindachner). (Plate XLVII.) 



Fig. 3. Dentition of Pfislohrycon calmoni (Steindachner). f. 



Serrasalmo calmoni Steindachner, Ann. K. Acad. Wiss. Wien, 1908, p. 361 

 (Para). 



Pygocentrus bilinealus Eigenmann, Ann. Carnegie Mus., Vol. V, 1909, p. 47; 

 Reports Princeton Univ. Exp. Patagonia, Vol. Ill, 1910, p. 442; Mem. Carnegie 

 Mus., Vol. V, 1912, p. 385, pi. LVI, fig. 2 (Aruka River, Mora Passage). 



