414 



KNOWLEDGE. 



November. 1913. 



Figure 482. Halitherium. 



Figure 483. Steller's Sea Cow. 



Figure 484. Dugong. 



FIGURE 485. The Jawbone of a Chimpanzee, 



showing mots of teeth ami the stout buttressed socket of the canine filling the side 

 of the "Chin." 



Figure 486. The lower Jaw and Tongue of a Macaque, 



from a drawing of a dissection by the Author, showing the deep pit for the 

 origin of the genio-g-fossits muscle. 



Figure 487. Human Jawbone with part of the Tongue, 



drawing showing the spreading Jasciculi of the genio-gtossits muscle, and their origin from the 



upper genial tubercle. 



489. Siamang. 



Figure 488. Transverse section 

 through the Tongue, 



diagram showing gaiio-glossus muscle penetrating 

 the intrinsic muscles. After Quain. 



491. Chimpanzee. 492. Dog. 



493. Man. 



494. Pig. 



Figures 489 to 494 show the under surface of the tongue and the proportions of the genio-glossus muscle. 



