1904.] 



OF THE BRAINS OF MAMMALS. 



189 



the extreme term in this same series. As I shall point out, some 

 other Ungulates agree. 



In some of the Oarnivora which I have had the opportunity of 

 examining there is, it must be admitted, a tendency in the same 

 direction. But in them the gap between the basilar and the 

 anterior spinal is never quite so inconspicuous as in Tamandua, 



Text-fie-. 19. 



Base of brain of Tamandua tetradactyla. The small figure on the right shows 

 the plexus referred to in the text. 



I., rhomboidal space enclosed by spinal artery ; c, carotids ; ce., junction of middle 

 and anterior cerebrals ; o., ophthalmic artery ; v., vertebral artery. 



while, moreover, the vei'tebral arteries are much moi'e conspicuous. 

 Tamandua is a little more Ungulate-like than Carnivore-like in 

 both of these points. At the same time it must be observed that 

 the vertebral arteries are larger proportionately than they are 

 represented by Tandler to be in Bos taurzcs, but certainly not so 



