198 



MR. R. II. BURNE ON THE 



In the Okapi (text-fig. 12) and on one side in the Giraffe (text- 

 fig. 11), the lingual arteries, after giving ofl* a large branch to the 

 hyoid region, passed superficially to the hyoglossus muscle, and 

 in neither case was there any anastomosis between the vessels in 

 this region. Nor was I able to trace in either of these genera 

 the huge connection between the lingual arteries at the com- 

 mencement of the free portion of the tongue described by Owen 

 in the Giraffe. 



On the other hand, I can corroborate the fact mentioned by 

 Owen that in the Giraffe the left lingual artery greatly exceeds 

 the right in size (text-fig. 11), and carries practically the whole 

 blood-supply to the free part of the tongue. 



Text-figure 13. 



Blood-vessels at the root' of the tongue of an Indian Antelope. 

 a.a., anastomosis of the lingual arteries. 

 Other lettering as in text-fig. 11. 



This is not, however, the case in the Okapi or among Antelopes 

 and Sheep. In them the two lingual arteries are of equal size, 

 but it should be noted that in the Okapi the left artery divides at 

 the commencement of the free part of the tongue into a large 

 ventral and a small dorsal branch, and thus provides the chief 

 source of supply to the ventral parts of the extremity of the 

 tongue, as it does in the Giraffe, the dorsal parts being supplied 

 by the right artery and the smaller branch of the left. 



The Larynx (text-figs. 14, 15, 16). 



The larynx of the Okapi presents a remarkably close resem- 

 blance to that of the Giraffe, and by its structure suggests that 

 the animal, like the Giraffe, is practically mute. In general it 



