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). 



,-ecpt 



<inq y 



FiG. -lit'. 



Skull of Polypterus bichir, Geoffr. A, dorsal, and C, lateral \ iew. (Modified from J. Muller 

 and Allis.) I!, ventral view, without the lower jaw. an, adnasal ; ang, angular ; boa; basi- 

 occipital ; d, dentary ; e, mesethmoid ; ecpt, ectopterygoid ; ept, endopterygoid ; /, frontal; 

 ;/, paired gular ; gop, suboperculum ; hy, hyomandibular ; m, maxilla ; n, nasal ; o, opisthotic ; 

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

 premaxilla; po, postorbital; pop, preopercular ; pt, post-temporal ; <iaad, quadrate; sop, sub- 

 operculum ; sp, spiracle ; spo, spiracular plate ; st, supratemporal ; vo, 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 



