294 



POLYPTERINI 



also present. The quadrate is only loosely connected with the 

 hyoid arch, and bears the articulation for the lower jaw (Figs. 266-7). 



pm 



,-ecpt 



Skull of Polypterus bichir, Geoft'r. A, dorsal, and C, lateral view. (Modified from J. Miiller 

 and Allis.) B, ventral view, without the lower jaw. an, adnasal ; any, angular ; boce, basi- 

 occipital ; ri, dentary ; e, mesethnioid ; ecpt, ectopterygoid ; ept, endopterygoid ; /, frontal ; 

 g, paired gular ; gop, subopercnlum ; hy, hyomandibular ; TO, maxilla ; 11, nasal ; o, opisthotic ; 

 op, opercular ; orb, orbit ; p, labial cartilage (dotted) ; pa, parietal ; par, parasphenoid ; pm, 

 premaxilla; po, postorbital; pop, preopercular ; pt, post-temix>ral ; qvad, quadrate ; soj>, sub- 

 operculuni ; sp, spiracle ; spo, spiracular plate ; st, suprateinporal ; ro, vomer. A dotted line 

 indicates the course of the lateral-line canal. 



The palato-pterygoid bar is, in fact, chiefly connected to the skull 

 by the palatine and long pterygoid articulation. The hyomandibular 



