":^^i s 



~r. 



^ ^ 





v^\ 





^.7 



Fig. ISA. Cross-section op L.\byrinthodont Teeth. Lobe-finned 

 Devonun Fisu (after Pander). 



For details see p. xvi. 



Fig. 18B. Primitive Amphibian of Permian Age (after 

 Embleton and Atthey). 



