76 Annals of the Carnegie Museum. 



point between snout and eye; four premaxillary teeth, only one maxil- 

 lary tooth; no mandibular teeth. 



Base of the dorsal a little nearer the snout than to the end of the 

 lateral line; second, third, and fourth rays projecting slightly, equal to 

 head less half the opercle; origin of ventrals about equidistant from 

 snout, and middle of dorsal; ventrals reaching anus, or a little shorter. 



Straw-colored, probably translucent in life; sides of head metallic 

 silvery; a silvery lateral band with a sharp ventral margin; chromato- 

 phores on the upper half of the scales of the lateral line in front, on 

 the entire scale of the lateral line on the caudal peduncle, continued 

 as a dark streak on the middle rays of the caudal; upper part of snout 

 in front of nares dark, upper half of opercle with numerous chromato- 

 phores; very faint dark shades across the back. The color is poten- 

 tially like that of affinis of the same size. The chromatophores are 

 similarly distributed, but less intensely pigmented. 

 6582 a-j, 59-85 mm. Penedo, March 20, 1908. Haseman. 



The specimens from Penedo are larger than any of the others; 



the dark shades across the back are more evident, the stripe along the 



lateral line less evident. The scales are more numerous, the lateral 



39 40 41 

 line being - — , ^-, — . The latter character evidently varies with the 

 2 71 



locality; in the Pirapora specimens it is — , — , in the Januaria speci- 



36 37 38 . ^, . r-A ^ A u 36 37 38 



mens — , — , — , m those irom Cidade do Barra — , — -, — . 

 Ill 362 



5. Apareiodon dariensis (Meek & Hildebrand). 



Parodon dariensis Meek & Hildebrand, Field Museum Publications, No. 166, 

 Zool. Ser., Vol. X. 1913, p. 83. 



Habitat. — Western slopes of Southern Panama. 



6. Apareiodon ecuadoriensis (Eigenmann & Henn). 



Parodon ecuadoriensis Eigenmann & Henn, Indiana University Studies, No. 19. 

 1914, p. 12 (Vinces River, and forest pools). 



Habitat. — Western slopes of Ecuador. 



7. Apareiodon terminalis (Eigenmann & Henn). 



Parodon terminalis Eigenmann & Henn, Indiana University Studies, No. 19, 

 1914, p. 12 (Vinces River, and forest pools). 



Habitat. — Western slopes of Ecuador. 



