CLASS PISCES. 225 



jaw to be seen ! . A third large species, also common 

 to both our seas, is the 



M. chelo, Cuv., particularly distinguished by its 

 extremely bulky fleshy lips, whose edges are ciliated, 

 and by teeth, which dip into their substance like so 

 many hairs ; the maxillary is recurved, and shows 

 itself behind the commissure. 



M. labeo, Cuv., a small Mediterranean species, has, 

 in proportion to its size, still larger lips, with crenated 

 borders. Several of these thick-lipped species are 

 found in the Indian Ocean 2 . 



Tetragonurus, Risso. 



So called from the two salient crests that are found 

 on each side, near the base of the caudal, is another 

 of those insulated genera which seem to indicate par- 

 ticular families. 



These fishes are partly allied to the mullets, and 

 partly to the scombero'ides. Their body is elongated ; 



1 Add the M. christian, Voy. Freycin. M. Ferrandi, ib. M. 

 parsia, Buch. pi. xvii. f. 71. M. cascasia, Id. M. peradak, Cuv., 

 Russell 182. 



2 M. crenilabis, Forsk. M. cirrhosthomus, Forst., App. Bl. 

 Schn. 121. 



N. B. The M. ccerideo-maculatus, Lacep. v. 389. the same re- 

 presented under the name of crenilabis, pi. xiii. f. 1. belongs to the 

 same group as the capito. The Mugil appendiculatus, Bosc. or 

 Mugilomore Anne-Caroline, Lacep. v. 398. is nothing else than the 

 elops, which is also the fact as respects the Mugil salmoneus, Forst., 

 BL, Schn. 121. Mugil cinereus, Walbaum, Catesb. II. xi. 2. is a 

 Gerres. The M. chanos, Forsk., belongs to the Cyprinidae. 

 VOL. X. Q 



