428 ORDER MALACOPTERYGII ABDOMINALES. 



Others have simply an elongated form. Their 

 first dorsal corresponds to the interval of the ventrals 

 and anal. 



But one species is known ; from Egypt \ 



Hydrocyon, Cuv., 



Have the end of the muzzle formed by the intermaxil- 

 laries ; the maxillaries commence near or in front of 

 the eyes, and complete the upper jaw. The tongue 

 and vomer are always smooth, but there are conical 

 teeth in the two jaws. A large suborbital, thin and 

 naked, as the operculum, covers the cheek. 



Some have a crowded range of small teeth at the 

 maxillaries and palatines ; their first dorsal corres- 

 ponds to the interval of the ventrals and the anal 2 . 



They come from the rivers of the torrid zone ; their 

 taste resembles that of the carp 3 . 



Others have a double range of teeth at the inter- 

 maxillaries and the lower jaw, a simple range on the 



1 The Raii of the Nile, which is the Cyprinus dentex, Linn., Mus. 

 Ad. Fr. and Xllth ed. ; or the Salmo dentex of Hasselquist, and the 

 S. Niloticus, of Forskal, and which is found twice in Gmelin and 

 his followers. It is the Myl. Hasselquistii, Cuv., Mem. Mus. IV. 

 pi. xxi. f. 2. 



2 This is the reason why they have been ranged among the 

 Osmeri by M. de Lacepede. 



3 Salmo falcatus, Bl. 385. S. odoe, Id. 386. Hydrocyon falci- 

 rostris, Cuv., Mem. Mus. V. pi. xxvii. f. 1. Hydr. hcpsetus, C. ; 

 or Hydr.faucille, Zool. du Voy. de Freyc. pi. xlviii. f. 2. 



