PALAEONISCOIDEI 



The hyomandibular is elongated backwards and connected with a 

 broad pterygoid plate. A symplectic has not been found. The lower 

 jaw has dentary, angular, splenial, and articular bones. 



Numerous radials occur in the pelvic fin of Coccolepis (A. S. Woodward 

 [501]), the only genus in which the endoskeleton of the fins is known. 



Fig. -J80. 

 Palaeoniscm macropomus, Ag.; restored. (After Traquair, from A. S. Woodward.) 



Sub-Family Cheirolepidixae. The Devonian Cheirolepis in the 

 minute size of its scales fitting close together, but scarcely overlapping, 

 approximates to the Acanthodii (Fig. 288) ; but otherwise it is a genuine 

 Palaeoniscid. The proximal lengthened segment of the lepidotrichia passes 

 inwards below the body-scales, overlapping the endoskeletal radials. The 



Fig. J87. 



Head of Palaeoniscus macroporniis, Ag. ; restored. (After Traquair, from A. s. Woodward.) 



nf, prefrontal : mi, angular ; In; brancbiostegals (lateial gulars) ; <■!, cleithnun : d, dentary ; e, 

 ethmoid;/, frontal; i.d, clavicle; i.op, subopercular ; mx, maxilla; n, narial opening; 

 opercular; p, parietal ; p.d, post-clavicle ; p.op, preopercular ; pt, post-temporal ; pma:, pre- 

 maxilla; q, pterotic (squamosal); scl, supraclavicle ; so, circumorbital ring and postorbitals ; 

 st, snpratemporal. Dotted lines indicate tlie course of lateral-line canals. 



anterior paired gulars are large, and there are large laniary teeth on the 

 jaws (Traquair [444]). 



Cheirolepis, Ag. ; Devonian of Europe and Canada. 



Sub-Family Palaeoniscidinae. The paired gular plates are not 

 much enlarged, the scales are of normal size, the lepidotrichia scarcely 

 extend inwards, and the teeth are usually quite small [446]. 



Ganobius, Traq. ; Cryphiolepis, Traq.j Gonatodus, Traq. ; Nematoptychius, 



