60MALE 



/A/TE/?ARmULARDISK 



[mA/iscas) 



^MECKElS 

 CARTILAGE 



mLLEUS'ARTICUUR 



_ WCUS 

 'QUADRATE 



STAPES 



HYOm 



TY/IPANJCrRWG 

 Fig. 114. Relations of Ossicles to Lower Jaw in 

 FcETAL Armadillo {Tatusia hybrida). 



(Composed from two figures by W. K. Parker.) 



, GOmiE 

 {Pf^EART/Cl/LAR) 



JNCaS 



ClUADRATE) 



^TYMPANIC 

 {ANQULAR) 



AfAUEl/S 



CART/LAGE GOM^L^j, , \^^K 



^AfAWBR/OH 



B 



Fig. 115. The Reptilian Stage in the Development 

 OF THE Auditory Ossicles. 



A. Lower jaw and attached auditory ossicles in a foetal hedgehog 

 (after W. K. Parker). B. Lower jaw and attached auditory ossicles in 

 a human foetus (after Macklin). For details, see p. xl. 



221 



