OUR FACE FROM FISH TO MAN 



hyoid gill arch of fishes. In the oldest known 

 amphibians, as in the frog (Fig. 106) the stapes 



handle 

 (leverarm\ 

 {ofmaUeus ) 



A 



aiti'c 



COQtooth 



joint /fi^, 



4'neus(anu-il) 



fencton of 

 frreffulatmg 



y TUKSCle 



tympamcr/m 



headofmaUeus 

 ' {hammer) 



foofplakof 

 stapes (st?rrup) 

 fitsffito /'n^erear 



B 





Fig. 111. The Middle Ear of Man, Showing the Auditory 

 Ossicles (after Cunningham). 



For details, see p. xxxix. 



extends from the inner ear to the tympanum or 

 drum membrane. AVhen the tympanum first ap- 

 peared (in the Amphibia) it was fastened (Fig. 



216 



