411 



KNOWLEDGE. 



November, 1913. 



432. Fossil Lemur. 433. Macaque monkey. 



434. Chimpanzee 435. Siamang gibbon, 



(young male.) 



436. The Naulette jaw 

 (Spy type.) 



437. Akka Pigmy, 

 from Central Africa. 



438. Bushman. 



439. Hottentot. 



440. Deaf Mute 441. An ordinary 



(French). European type. 



Figures 432-441 show the progressive stages from the beginning of the Genial Pit 

 in the Lemur to the fully developed Genial Tubercles in modern civilised man. 



442. Hottentot. 



443. Hottentot. 



444. Bushman. 



445. Hottentot. 



446. Bushman. 



447. Hottentot. 448. Bushman. 449. Andaman Islander 450, Veddah 451. Low type 



(Negrito). (Ceylon). (West Africa.) 



FIGURES 442-451 show the imperfect development of Genial Tubercle and the persistence 

 of the " Simian Pit " among certain low races with only imperfect articulate speech. 



CASTS OF THE INS1UES OF LOWER JAWS. 



