140 



Bulletin American Museum of Natural History. \Yo\. XXVII, 



proc cond 



/>roc 6>-eviS 





pi-oc ant : 



\fA ng) ynernbty Htp 



ext col 



fx-oc i^C-y; 



Fig. 7. Diagram illustrating the application to the conditions in the Cynodontia of the 

 quadrate = incus, articular = malleus theory. A. Cynogiiathus, after Broom; B, hypothetical 

 intermediate stage; C. embryo mammal {Tatusia) after Parker. 



Abbreviations as in previous figures. 



