SOUTH AMERICAN NEMATOGNATHI. 135 



Color brownish, with numerous minute dark dots; a 

 dark lateral band, deepest at the shoulder. 



Head 4J-4i; depth 5f-7; Br. 7; D. I, 6; A. 9-11. 



The specimens examined are from Gorgoiia; Rio 

 Chagres; Rio Obispo; Turbo, Atlantic Coast Centr. Am. 



93. Rhamdia longicauda, 



"Pimelod-us longicauda Boulenger, Proc. Zool. Soc. Lond. March 



1887, 275, plate xx, fig. 2 (Canelos). 

 Rhamdia lonyicauda Eigenm. & Eigenm. Proc Cal. Acad. 2d Ser. i, 



126, 1888 (name). 

 Habitat: Eastern Ecuador. 



This species is known only from the description and 

 figure quoted above. 



94. Rhamdia dorsalis, 



Rhamdia dorsalis Gill, Proc. Acad. Nat. Sci. Philad. 1870, 94 (Up- 

 per Amazon). 

 Habitat: Marafion. 



This species is known only from the types. 



95. Rhamdia poeyi, 



Rhamdia poeyi Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. i, 127, 



1888 (Goyaz). 

 Habitat: Goyaz. 



Width of body about equal to its depth, much com- 

 pressed toward the caudal. Head short, flat above, the 

 sides not very steep, its greatest width 1J in its length; 

 fontanel not continued behind the eye; occipital process 

 very short, triangular, reaching two-sevenths the dis- 

 tance from its base to the dorsal spine. A few large 

 pores about the head. 



Eye 3 in snout, 7 in head, 1J in interorbital. 



Maxillary barbels scarcely reaching the vertical from 

 the dorsal spine; postmental barbels about reaching to 

 the edge of the branchiostegal membrane, the mentals 

 less than half as long. 



Branchiostegal membrane separate to below the ante- 

 rior part of the eye. Gill-rakers 3+7. 



Distance of dorsal spine from tip of snout less than 3 



