,9o8.] THE ANDAMAN AND NICOBAR ISLANDERS. 55 



Grams. 



Left hemicerebrum 493 



Right hemicerebrum 490 



Cerebellum, pons and oblongata 130 



Total 1,113 



Various calculations indicate that the fresh weight of this brain 

 was probably between 1,200 and 1,250 grams. 



The brain is broad and short.^ The frontal lobes are less mas- 

 sive than in whites. The fissuration is well marked but not very- 

 complex. The precallosal length is less than in whites. The cal- 

 losum is of good size, comparing well with those of whites. The 

 calcarine fissure is interrupted on the left side. The fissural pecu- 

 liarities must be considered more fully in the final publication, and, 

 if possible, should be based upon comparison with more specimens 

 from natives of this race. The following dimensions may be re- 

 corded here : 



Centesimals. 



Brain-length, left half 16.1 



Brain-length, right half 15.8 



Brain-width 13.9 



Cerebral index 86.9 



Horizontal circumference 47.0 



Width, left hemicerebrum 6.9 



Width, right hemicerebrum 7.0 



Left occipito-temporal length 12.6 



Right occipito-temporal length 12.4 



Length of callosum '].2) 



Percentage of callosal length 45-3% 



Left centro-temporal height 10.6 



Right centro-temporal height 10.6 



Left centro-olfactory height 8.7 



Right centro-olfactory height 8.7 



Arc Measures. 



(Frontal 14.5 



Parietal 5.0 



Occipital 5.5 



Frontal 14.5 



Right \ Parietal 4.5 



Occipital 6.0 



I 



Cerebral Indices. 



Frontal 58.0 



Left \ Parietal 20.0 



Occipital 22.0 



Frontal 58.0 



Right \ Parietal 18.0 



Occipital 24.0 



' It was somewhat flattened upon its dorsum during transportation. 



