Glassijicalion of the Order Apodes. 



383 



spiiios sliovt, laminar ; neural arches without zygapophyses ; 

 caudal vertebrpo without lateral transverse processes ; ribs 

 and intermuscular bones feeble, 



Heterenchelys^ with two species from West Africa (' Annals,' 

 Sept. 1912, p. 323). 



Fisr. 1 . 



PPP op sop 





Ooc 



prv osp 



Heterenchelys macrurus. Jaws, hyo-palatiue, and opercular boues, and 

 skull from above and from the side. 



mx, maxillary ; den, dentary ; ar, articulare ; ^)<, palato-pterygoid ; 

 hm, hyomandibular ; q, quadrate ; jmp, praeoperculum ; op, opercu- 

 lum ; sop, suboperculum ; iop, interoperculum ; br, branchiostegals ; 

 eth, ethmoid; v, vomer; /, frontal ; p, parietal ; jisp, parasphenoid ; 

 asp, alisphenoid ; osp, orbitosphenoid ; /?;-o, prootic ; spo, spheuotic ; 

 pto, pterotic ; epo, epiotic; soc, supraoccipital ; eoc, exoccipital : 

 hoc, basioccipital. 



