THE FIRST AIR-BREATHERS. 



157 



scaly armour, the latter in some cases highly ornate.^ They 

 were probably the most th-^roughly terrestrial, and the most 

 active of the coal batrachians, if indeed they were not strictly 

 intermediate between them and the lizards proper. Fig. 138 



a 





^w-mpv-wmf^^^ 



p^^^W^A.V)i^ :nJl5MM.14.^>!j^^;. 



e O 



if 



/,.:vr- ■/; . /-^ ^_ p.- '^^■'1*^ 





Fig. 138.— a lizard-like Amphibian (JJylonomus aciedentatus). 



a. Maxillary bone ; enlarged. d. Section of tooth ; magnified. 



h. Mandible ; enlarged. ^. Scale ; natural size and magnified. 



c. Teeth ; magnified, showing front and Fide /, Pelvic bone(?) ; natural size. 



view of ordinary tooth and grooved /r Rib ; natural size. 



anterior tooth. A. Scapular bone (?) ; natural size. 



t. Palate ; natural size. 



shows some fragments of one of these animals ; and the animal 

 represented in Fig. 139, recendy figured by Fritsch, probably 

 belongs to this group. 



1 Hylonomus» 



