224 



Proceedings of the Royal Physical Society. 



teriorly into the supra-spinous region of the occiput. The 

 skull possesses a well-marked oval form. The muscular 

 ridges and prominences are not very strongly pronounced, and 

 the cranial bones possess none of that coarseness and thick- 

 ness which are so often regarded as characteristic of the negro 

 skull In its internal capacity the skull measures 79 cubic 

 inches, which is somewhat below the mean of 83 cubic inches 

 given by Dr Morton as the average capacity of the negro 

 crania he had examined. The following are some of the 

 principal external dimensions of the skull, expressed in 



Manganya Skull — Fig. 1. 



inches and tenths: — Extreme length, 67; breadth (parietal), 

 5'0; height, 5-2. Greatest frontal breadth, 4*2; parietal, 

 5*0 ; occipital, 3 8 ; zygomatic, 4-7. Fronto-nasal radius, 

 3*5 ; maxillary, 3*9 ; frontal, 4*3 ; parietal, 4-7 ; occipital, 

 34. Longitudinal arc, 14-0 ; frontal, 5*0 ; parietal, 5*0 ; 

 occipital, 4*0. Frontal transverse arc, 11*1; parietal, 12*8 ; 

 occipital, 1O0. Horizontal circumference, 19 -0. The ratio 

 of length to breadth is 100 to 75; of length to height, 100 



