PISCES. 99 



Epicyrtus Muell. Teeth conical, unequal, in single row, inter- 

 rupted in intermaxillary bone, supramaxillary and lower jaw. 

 Palate smooth. Branchiostegous membrane with four rays. Body 

 compressed, with abdomen not serrate. Ventral fins near to 

 pectoral. 



Sp. Eficyrtus gibhosus Muell., Sahno gihhosus L., Gronov. Mus. Ichth. 

 Tab. I. fig. 4, Cuv. et Val. Poiss. xxii. PL 636 ; Surinam. 



Valenciennes is of opinion that the genus Exodon Muell. ought not to 

 be separated from this. 



Chalceus Cuv. Teeth sliort, multicuspidate, in double or treble 

 row in upper jaw, double or single row in lower jaw. Palate 

 smooth. Body compressed, with abdomen not serrate. Scales 

 large. Branchiostegous membrane with four rays. 



Chalceus Cuv., Brycon Muell. and Trosch. Teeth in a triple 

 row in upper jaw, double in lower. Abdomen rotundate. 

 Sp. Chalceus macrolepidotus Cuv., Mem. du Mtis. iv. PI. 21, fig. i. 



Tetragon02yterus Artedi, Muell. Teeth in double row in upper 

 jaw, in single row in lower jaw. Abdomen rotundate. 



Sp. Chalceus Artedii, Coregonus amboinensis Abtedi, Descr. specieruvi Pise. 

 p. 44, SEBM^Thesaur. iii. Tab. 34, fig. 3, &c. 



Brycinus Valenc. 



Chalcinus Valenc, Chalceus Muell. Double row of teeth in both 

 jaws. Abdomen carinate. 



Sp. Chalceus branch tpomtis, Clialcinus branchipomus Valenc, Chalceus 

 angulatus Spix. 



Oasteropelecus Gronov. Teeth tricuspidate, in intermaxillary 

 bone in a double row, in single row in lower jaw. Teeth of supra- 

 maxillary bone conical, in a single row. Palate smooth. Body 

 compressed, with abdomen convex, carinate. Ventral fins very 

 small. Scales small. 



Sp, Oasteropelecus sternicla Pall., Clupea sternicla L., Gronov. Mus. 

 Ichth. Tab. vn. fig. 5, Pallas S'picil. Zool. viil. Tab. 3, fig. 4 ; Surinam. 



Myletes Cuv. Teeth prismatic, tricuspid, in a double row in 

 intermaxillary bone; teeth of lower jaw thick, with crown flat- 

 tened, the two middle mostly conical, forming a second row. Su- 

 pramaxillary bone edentulous. Palatine teeth none. Body com- 

 pressed. 



7—2 



