442 



TELEOSTEI 



B. Family MOLIDAE. The beaks have no median suture ; the body is 

 compressed and truncated behind, the vertebrae numbering seventeen, and 

 the caudal being replaced by the dorsal and anal fins which join posteriorly. 

 There are no inflatable sacs, the skin is naked or with small spines. The 

 skeleton is very fibrous, and very imperfectly ossified. 



Orthagoriscus, B. and S. (Mola, Guv.) ; Ransannia, Nardo Atlantic. 



mi 



Ssc 



Brs- 



Fid. 456. 



Skeleton of head and .shoulder-girdle of Perca fluvintilis, L. (After Cuvier, from Clans and 

 Sedgwick.) Ac, postclavicles ; AJs, alisphenoid ; An, angular; Ar, articular; B.rs, branchio- 

 stegal rays ; Cl, cleitbrum ; Cor, coracoid ; D, dentary ; Ekp, ectopterygoid ; Enp, endo- 

 pterygoid ; Ethi, mesethmoid ; EM, prefrontal ; Fr, frontal ; Frp, postfrontal ; hm, hyo- 

 mandibular ; Hy, hyoid arch ; Jm, premaxilla ; JOp, interopercular ; Mty, metapterygoid ; MX, 

 maxilla ; Oex, epiotic ; Op, opercular ; Os, supraoccipital ; Pal, palatine ; Par, parietal ; POp, 

 preopercular ; l'r.0, prootic ; Ps, parasphenoid ; Q, quadrate ; S, symplectic ; Se, scapula; Sop, 

 subopercular ; $rj, pterotic ; S'c, supraclavicle and post-temporal ; Vo, vomer. 



SCB-TRIBE C. The subocular shelf has been lost. 



Family ACROPOMATIDAE. Somewhat intermediate between the 

 Serranidae and the Percidae. 



Acropoma, Schlg. ; Dinolestes ; Malacichihys, Dod. ; Propoma, Gthr. ; 

 Synagrops, Gthr. Pacific. 



Family PERCIDAE. Chiefly freshwater fish, with not more than three 

 anal spines, a mouth at most feebly protractile (Fig. 456), and a divided 

 dorsal fin. 



Prelates, Pr. ; Cretaceous, Europe. Cyclopoma, Ag. ; Eocene, Europe, 



