ILLUSTRATIONS 



FIGURE PAGE 



tiles, is inferred from the presence of a facet on the 

 lower outer end of the quadrate. 



113. — Origin of Auditory Ossicles . . . 218 



A. Back part of the lower jaw of Cynognatkus, 

 inner side. (Based chiefly on a cast of the type of 

 Cynognathus craternotus, combined with observations 

 and figures of Seeley and Watson.) 



B. Fcetal mammal, Perameles. (Slightly modified 

 from R. W. Palmer.) 



114. — Relations of Ossicles to Lower Jaw on 



Fcetal Armadillo {Taiusia hyhrida) . . 221 



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



115. — The Reptilian Stage in the Development 



OF the Auditory Ossicles . . . 221 



A. Lower jaw and attached auditory ossicles in 

 a foetal hedgehog (Erinaceus). (After W. K. Parker.) 



B. Lower jaw and attached auditory ossicles in a 

 human foetus of 43 millimeters length. (After 

 Macklin.) 



116. — Young Chimpanzee, Showing Facial Expres- 

 sion ...... facing 222 



(From a photograph by Herbert Lang.) 



117. — Stockard's Linear and Lateral Growth 



Types 232 



(After Stockard.) 



A. Infant. 



B. "Linear" adult. 



C. "Lateral" adult. 



118. — Side View of Human Figure, to Indicate 

 the Anterior Tip and the General Direc- 

 tion OF THE Lateral Line . . . 234 

 (After Stockard.) 



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