ANASTOMUS. FISHES. 4,03 



lateral line ; the upper row of teeth small and denticulated ; tail 

 deeply forked. 18 inches long. Inhabits Lakes of South America. 

 Block, pi. 381, fig. 3. 



C.fasciata, Cuv. Body pale-yellow, deepening on the back into 

 dull brownish orange, with transverse brown bands ; a row of 

 teeth in each jaw, directed obliquely forwards, the anterior ones 

 largest ; dorsal fin and tail crossed by an obscure black band. 1 

 foot long. Inhabits Surinam. Block, pi. 379. 



Gen. 6. ANASTOMUS, Cuv. Salmo, Lin. 



Mouth terminal, small ; head compressed ; one row of small 

 teeth above and below ; the lower jaw turned up before the 

 upper one ; branchial membrane with four rays. 



A. Gronovii. (S. anastomus, Lin.) Inhabits Indian Seas. Gronov. 

 Mus. pi. 7, fig- 2. 



Gen. 7. SERRASALMUS, Lacep. Salmo, Lin. 

 Body compressed, high vertically ; belly carinated and serrat- 

 ed ; teeth triangular, edged, dentated, and disposed in one 

 row on the intermaxillaries and lower jaw ; branchial mem- 

 brane with four rays. 



S. rhombeus, Cuv. Body dusky red above, marked with a few scat- 

 tered dusky spots ; sides and abdomen silvery ; abdomen strong- 

 ly carinated and serrated ; tail lunated and terminated with a 

 black border ; a trifid spine before the dorsal fin. Inhabits 

 Rivers of Surinam Block, pi. 383. 

 This species grows to a considerable size, pursues ducks, and even tears with its 



sharp teeth the skin of those who attempt to bathe. 



Gen. 8. PIABUCUS, Cuv. Salmo, Bloch. 



Body elongated, compressed ; head small, and mouth little 

 cleft ; teeth pointed and dentated as in the preceding ; belly 

 carinated ; anal fin very long ; first dorsal fin opposite the 

 anal one ; branchial membrane with four rays. 



P. argentinus 3 Cuv. Body greenish above, silvery below, with a 

 bright silvery longitudinal line running from head to tail, at some 

 distance above the lateral line ; fins pale or white ; tail forked. 

 6 to 8 inches long. S. American Rivers. Block, pi. 382, fig. 1. 



Gen. 9. TETRAGONOPTERUS, Artedi. 



Body compressed, high vertically ; two rows of triangular and 

 dentated teeth in the upper jaw ; mouth small ; belly not 

 carinated ; anal fin long. 



T. argenteus, Artedi. Rivers of South America. Seba, iii. pi. 34. 

 Gen. 10. MYLETES, Cuv. Cyprinus, Lin. 



Teeth triangular, short, rounded on the edges, the upper sur- 



