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, Cuv.) : Ranmnnia, Nardo — Atlantic. 



Fro. 456. 



Skeleton of head ami shoulder-girdle of Perea fluviatilis, L. (After Cuvier, from Claus and 

 Sedgwick.) Ac, postclavicles ; Als, alispheooid ; An, angular ; .1/', articular; B.rs, branchio- 

 stegal rays ; CI, cleithrum; Cor, coracoid ; 1>. dentary ; Klj>- ectopterygoid ; Enp, endo- 

 pterygoid ; Ethi, mesethmoid ; Ethl, prefrontal ; Fr, frontal; /■'/•,/>. postfrontal ; i/«, hyo- 

 mandibular; Hy, hyoid arch ; •//». premaxilla; JOp, interopercular ; Mty, metapterygoid ; il*\ 

 maxilla; Oez, epiotic ; Op, opercular; Os, supraoccipital ; /'<</, palatine; Par, parietal; /'('/>, 

 percular; Pr. 0, prootic ; Ps, parasphenoid ; Q, quadrate; S, symplectic ; Sc, scapula ; Sop, 

 subopercular ; Sq, pterotic; Ssc, supraclavicle and post-temporal ; Vo, vomer. 



Sub-Tribe C. The subocular shelf has been lost. 



Family Acropomatidae. Somewhat intermediate between the 

 Serranidae and the Percidae. 



Acropoma, Schlg. ; Dinolestes ; Maladchthys, Dud. ; 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. 



Prolates, Pr. ; Cretaceous, Europe. Gyclopoma, Ag. ; Eocene, Europe. 



