PISCES. 101 



Cynopotamus VALENC. Teeth conical, acute,' in the 'intermakil- 

 lary bone in a double row, in a single row in lower jaw. Bran- 

 chiostegous membrane with five rajs. 



Habitus of Epicyrtus. Palate smooth. Scales small. 



Salminus AGASS., MUELL. Teeth conical, in a double row in 

 the intermaxillary bone and the lower jaw. Teeth of supramaxil- 

 lary bone in a single row, conical, small. Branchiostegous mem- 

 brane with four rays. 



Sp. Salminus Cuvieri VALENC., Hydrocyon brevidens Cuv., Mem. du Mus. 

 v. PL 27, fig. i, Brazil, &c. 



Hydrocyon Cuv. (in part). Teeth conical, large, in both jaws 

 in a single row, the upper alternating with the lower. 



t Palate smooth. 



Hydrocyon AGASS., MUELL. Scales large. Branchiostegous mem- 

 brane with 4 rays. 



Sp. Hydrocyon Forskahlii Cuv., Mem. du Mus. V. PL 28, fig. I, in the Nile 

 and also in the Senegal. 



ft Palate furnished with teeth. 



Xiphorhynchus AGASS. (Xiphorhamphus MUELL.). 



Cynodon SPIX (Raphiodon AGASS., MUELL., and Hydrolycus 

 MUELL.). 



Note. Smaller conical teeth with larger mixed. Scales moderate or 

 small. Species from S. America. 



a) Conical palatine teeth in a single row t 



Sp. Hydrocyon falcirostri* Cuv., Xiphoramphus falcirostris MUELL., M6m. 

 du Mus. v. PL 27, fig. 3. 



b) Palatine teeth minute, with crowded granules. Branchiostegous mem- 

 brane with 5 rays. 



Sp. Hydrocyon scomberoide Cuv., Cynodon scomberoides VALENC., Mem. 

 du Mus. v. PL 27, fig. 2. 



Salanx Cuv. Teeth in both jaws conical, incurved, unequal. 

 Palatine bones with a single row of small teeth. Head depressed. 

 Body elongate. Dorsal fin remote, placed behind ventral fins. 

 Branchiostegous membrane with four rays. 



Sp. Salanx Cuvieri VALENC., Salanx Reevesii VALENC., Albula chinensis 

 OSBECK, Leucosoma Reevesii GBAT, VALENC. Poiss. xxn. p. 363, PL 646; 



