/%vk 



artfAfed] 





D 



/^ecl 



7rf-fAf6>r/() 



Spc pospl a?^a/ prmrt 



/^ecAe/^ cartilag^e 



! '^s^x^ 



cor 



sura/^^ 



Pig. 64. Right Half of the Lower Jaw of Lobe-finned Fish 



(A, C) AND Primitive Fossil Amphibian (B, D), and Recent 



Turtle Embryo (E). (A, C, after Watson; B, D, after 



Williston; E, after Parker.) 



For details, see pp. xxvii, xxviii. 



Ill 



