196 CYCLJLA. 



Upon the same Plate we have also the figure of a 

 fish to which the generic name Pacu is applied, 

 P. lineatus; it will range apparently among the 

 salmon carps or Prochilodi ; it is a handsome spe- 

 cies, olive shading to silvery, and it is marked 

 longitudinally with twelve dark narrow lines. The 

 colouring may have perhaps been somewhat lost in 

 transportation. 



In the genus Cychla, and in that form to which 

 we have considered it as more particularly restricted, 

 we have seen that the rivers of Guiana were parti- 

 cularly rich ; a single species of this form is repre- 

 sented in the Brazilian F&K*, 



