igoS.] 



THE ANDAMAN AND NICOBAR ISLANDERS. 



57 



Fig. 2. Brain of Nicobarese (dorsal view). 



white brain. The calcarine fissure is interrupted on both sides, the 

 interruption being somewhat concealed on the left side. The cal- 

 losum is small, a fraction over 5 sq. cm. The indusium, however, 

 is quite massive, and further study of rhinencephalic parts may- 

 prove interesting. The insula is slightly visible on both sides. 

 The measurements of this specimen are as follows : 



Centesimals. 



Brain-length, left 19. i 



Brain-length, right 18.5 



Brain-width 13.3 



Cerebral index 70.0 



Horizontal circumference 52.0 



Width, left hemicerebrum 6.9 



Width, right hemicerebrum 6.4 



Left occipito-temporal lobe 14.3 



Right occipito-temporal lobe 14.2 



Length of callosum 8.5 



