PERCIFORMES 



429 



continuous dorsal fin and from five to seven branchiostegals. The 

 palate is usually toothless ; but the teeth on the jaws become very 

 powerful, those in front being modified as incisors and those farther back 

 as flat grinders (Fig. 435). Rarely hermaphrodite (Chryso])hrys). 



iy. 434A. 

 Sargus ovis, Mitch., the Sheep's-head. Right-side view and dentition. (After Gunther.) 



Sparnodus, Ag. ; Triyonodon, Sism. Eocene, Europe. Sargus, Cuv. 

 (Fig. 434A) ; Spams, Kl. ; Pagrus, Cuv. ; Pagellus, C. and V. widely 

 distributed, and Miocene. Dentex, Cuv. ; Caerio, Com. ; Box, Cuv. ; 

 Ghrysophrys, Cuv. 



Fio. 435. 



A, dorsal view of the lower jaw of Sargus rufeswns, C. and V. (After Owen.) 13, front view 

 of the upper jaw of Sargus .vetula, C. and V. (After Owen.) i, incisiform teeth ; g, grinding 

 teeth ; y, young teeth. 



Family MDLLIDAE. Closely related to the preceding ; but with a 

 feeble dentition, only four branchiostegals, and with two scapular 

 foramina. The dorsal is subdivided. 



Upeneoides, Blk. ; Mullus, L., Red Mullet ; Mulloides, Blk. ; Upeneus, 

 C. and V. ; widely distributed in warm seas. 



