188 



PROCEEDINGS OF THE NA TIONAL MUSEUM. 



VOL. XXXII. 



anterior fossae, but certain objections, valid and partly .shown before, 

 are liable to be raised ag-ainst it/' It is therefore advisa])le to con- 

 trast the leng'th of the cavities in all the series also with the mean 

 ventral diameter of the crania.* The next table gives the relations 

 of the mean of the two frontal fossae with the mean ventral length of 

 the skulls in all the groups dealt with in the preceding list, and it will 

 be seen that, though the figures differ a little, the results are substan- 

 tially identical. 



Mean length of the (interior cranial fossse in relation to tlie mean of the right and left 

 greatest ventral diameters of the skull. 



Subjects. 



Adults: 



Whites, males— 



DDlichocephals 



Mcsdceiiluils 



Brachyeephals 



Whites, females^ 



Dolichocephals 



Mesocephals , . 



Brachycephals 



Indians, males — 



Dolichocephals 



Brachycephals 



Negroes — 



Males, dolicho- and mesocephals 



Females, dolicho- and mesocephals 



Fetuses and young: 



White fetuses and children, brachycephals.. 

 Colored fetuses and children, brachycephals 



Dolicho- and mesocephals 



Anthropoid apes: 



Chimpanzees 



Orangs 



fxibbons 



Monkeys and lemurs: 



Macacuspelops 



C'ebtis liypoltiicus 



Alouata senieula 



Midas 



Lemur rarius 



other mammals: 



Ursus amerlcnnus 



Deer 



Num- 

 ber of 

 skulls. 



Average 

 relation of 



the fossae 

 (mean ven- 

 tral length 

 =100). 



29.3 

 29.6 

 29.6 



29.4 

 30.4 

 30.0 



28.0 

 29.5 



30.4 

 31.0 



33.1 

 32.2 

 32.3 



35.3 

 34.4 

 37.5 



38.3 

 34.7 

 39.1 

 33.1 



41.5 

 38.4 

 34.1 



Average 

 relation of 

 the fossse 

 (greatest 

 external 

 length= 

 100). 



27.2 

 27.5 

 27.3 



27.1 

 28.1 



28.2 



25.5 

 26.8 



27.3 

 28.3 



31.1 

 30.9 

 30.6 



32.9 

 30.4 

 36.2 



36.0 

 30.0 

 32.9 

 31.7 



36.7 



Num- 

 ber of 

 skulls. 



The position of the Indian is seen in this table in a clearer light, 

 and the same is true of the negro, the former appearing nearer to 

 the white man and the latter nearer to less developed forms of crania. 

 The exceptional position of the gibbons among the anthropoid apes, 

 and of the macaque, alouata, and lemur in the following group, remains 

 accentuated. 



The correlation of the anterior with the other fossw of the skull 

 will be treated of later on. 



« Varying dimensions of the glabella and occipital ridges ; the point chosen in 

 apes instead of glabella ; the varying thickness of bone included. 

 & Average of the greatest internal length of the right and left side. 



