220 SERRASALMO. 



seriem simplicem in mandibula prominente, et in maxi- 

 mis ossibus inter- maxillaribus totum oris superiorem 

 marginem conformantibus. Ossa maxillaria superiora 

 minima ad commissuram maxillarum transversa. Lingua 

 apice libera. Membrana branchiostega radiis 4 latis. 

 Corpus compressissimum, latissimum, squamis minimis 

 obductum ; abdomen carinatum serratumque. Pinnae 

 mediocres, dorsalis latior, analis latissima." 



We begin with the drawing which we consider 

 identical with the Piranha Saw-bellied Salmon of 

 the Brazilian Fishes, being given by both Agassiz 

 and Cuvier as characteristic of the genus, and have 

 figured it to show the colours, taken from the living 

 fish, and appearing much more brilliant than any 

 representation hitherto published. 



