ILLUSTRATIONS 



FIGURE PAGE 



B. Fossil Ehringsdorf man. Both the first and the 

 second lower molar clearly show the fovea anterior. 

 (Compare Fig. 79A.) The second lower molar shows 

 an early stage in the formation of the cruciform or 

 plus pattern. 



C. Fossil Neanderthal man (Le Moustier), showing 

 modified Dryopithecus pattern. Cusp 6, occasionally 

 found in the anthropoids, is present. 



D. Recent Australian aboriginal. In the first 

 molar the Dryopithecus pattern is very evident; the 

 base of cusp 3 is in contact with the base of cusp !2; 

 cusp 6 is unusually large. In the second lower molar 

 the Dryopithecus pattern is changing into the plus 

 pattern. 



E. Modern Hindu, showing Dryopithecus pattern 

 in the first lower molar, and plus pattern in the second. 



F. Modern White, with modified Dryopithecus pat- 

 tern in the first lower molar, a complete plus pattern 

 in the four-cusped second molar, and a reduced third 

 lower molar. 



81. — Dissection of Head of Shark, Seen from 

 Above, to Show Relations of Olfactory 

 Capsules to Brain, Eyes and Internal 

 Ears . . . . . . .155 



(Modified from Marshall and Hurst.) 



82. — Jacobson's Organ in the Human Fcetus . 159 



A. Location of Jacobson's organ. The sound is 

 inserted into the opening of the organ. (After Corning.) 



B. Frontal section of foetal human nose, showing 

 vestige of Jacobson's organ. (After Corning.) 



(A, B, from Lehrb. d. Entw. des Menschen, J. F. 

 Bergmann.) 



83. — Longitudinal Section of the Skull in Man 



AND Chimpanzee ..... 160 



A. Adult female chimpanzee. 



B. Man. (After Cunningham.) 



xxxiii 



