ANATOMY OF THE TAKIN. 



215 



up to the supero-mesial margin. Into this, half way up, runs 

 the coronal, which passes straight backwards from the tip of the 

 frontal pole, a distance of 45 mm. 



The caloarine, intercalcary , and cruciate sulci form one 

 continuous furrow, cutting the supero-mesial margin 40 mm. 

 behind the frontal pole and running downwards and forwards on 

 the lateral aspect for 16 mm. Its end is separated from the 

 coronal sulcus by a gyrus of 5 mm. breadth. 



The lateral sulcus starts 5 mm. behind the transverse sulcus as 

 a short straight sulcus, 15 mm. long. The hinder end of this is 

 embraced by the widely bifurcated anterior end of another longi- 

 tudinal sulcus which pursues an undulating course backwards for 

 40 mm., ending by bifurcating widely 9 mm. in front of the 

 occipital pole. This gives off four short branches in its anterior 



Text-figure 7. 



Dioptograph outline of Mesial Aspect of Brain. 

 S.C.Q. = Superior Corpus Quadrigeminum. O.C.=Optic Cliiasma. 



half, two up and two down. The latter reach to within 5 mm. 

 of the suprasylvian ; elsewhere the gyrus separating the two sulci 

 is 13 mm. broad. The lateral sulcus, as in most Ungulata, is 

 obliquely placed, so that it approaches the mesial mai'gin more 

 nearly at its anterior end. 



The ectolate7xd sulcus lies between and parallel with the 

 preceding and the posterior branch of the suprasylvian. It is 

 20 mm. long and its posterior bifurcation forms a vertical sulcus, 

 25 mm. in length, running parallel with the hind margin of the 

 hemisphere. Across the anterior end of the ectolateral sulcus 

 lies a vertical sulcus 20 mm. long separated from it by 3 mm. 



A small curved enfoluteral sulcus, concave mesially, 15 mm. in 

 length from tip to tip, lies between the latei'al sulcus and the 



