CONTENTS. 



Red-spotted Cychla. PAGE 



CycUa ? rubro-ocellata. Plate X. . .153 



Centrarchus . . . . .155 



Cychla-like Centrarchus. 



Centrarchus cychla. Plate XL . . , 157 



Dark Centrarchus. 



Centrarchus niger. Plate XII. . . . 159 



Dark-marked Centrarchus. 



Centrarchus notatus. Plate XIII. . . 1 60 



Black-banded Centrarchus. 



Centrarchus^ vittatus. Plate XIV. . . 161 



Long-snouted Centrarchus. 



Centrarchus W rostratus. Plate XV. . . 163 



Blue-finned Centrarchus. 



Centrarchus ? cyanopterus. Plate XVI. . . 1 65 



Pomotis ... 16" 



Black-banded Pomotis. 



Pomotis ? fasciata. . . . 169 



Bono of the Warrau Indians. 



Pomotis t Plate XVII. . . .171 



Gymnotus . . . . . .172 



Electric Gymnotus. 



Gyvmotus ekctri&as. Plate XVIII. . . 173 



Irregularly Banded Gymnotus. 



Gymnotus fasciatus. Plate XIX. . .174 



Trygon ...... 175 



Many-spined Trygon. 



Trigon histrix ? Plate XX. . . .180 



Ocellated Trygon. 



Trygon garrapa. Plate XXI. . , .182 



Round- winged Trygon. 



Trygon strogylopterus. Plate XXII. . . 183 



Spine-tailed Elipesurus. * 



Elipesurus spinicauda. Plate XXIII. . . 184 



Parker's Silurus. 



Silurus Parkerii. Plate XXIV. . . 188 



Pristigaster . . . . .191 



Hydrocyon . . . . .193 



