CONTENTS. 



Red-spotted Cychla. 



Cychla ? rubro-ocellata. Plate X. 

 Centrarchus 



Cychla-like Centrarchus. 



Centrarchus cychla. Plate XI. . 

 Dark Centrarchus. 



Centrarchus niger. Plate XII. . 

 Dark-marked Centrarchus. 



Centrarchus notatus. Plate XIII. 

 Black-banded Centrarchus. 



Centrarchus ? vittatus. Plate XIV. 

 Long-snouted Centrarchus. 



Centrarchus ? ? rostratu^. Plate XY. 

 Blue-finned Centrarchus. 



Centrarchus ? cyaiiopto'm. Plate XVI. 

 Pomotis 



Black-banded Pomotis. 



Pomotis ? fasciata. 

 Bono of the Warrau Indians. 



Pomotis ? Plate XVII. 

 Gymnotus .... 

 Electric Gymnotus. 



Gymnotus electricus. Plate XVIII. 

 In-egularly Banded Gymnotus. 



Gymnotus fasciatus. Plate XIX. 

 Trygon .... 



Many-spined Trygon. 



Trigon histrix ? Plate XX. 

 Ocellated Trygon. 



Trygon garrapa. Plate XXI. . 

 Round-winged Trygon. 



Ti'ygon strogylo2:>terus. Plate XXII. 

 Spine-tailed Elipesurus. 



Elipesurus spinicauda. Plate XXIII. 

 Parker's Silurus. 



Silurus Parkerii. Plate XXIV. 

 Pristigaster 

 Hydrocyou 



