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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 87 



No definite sex differences appear in the total index, but the num- 

 bers of specimens in this category is too irregular and mostly inade- 

 quate to be of decisive value. The upper facial index tends in general 

 to be higher in the females, owing to the relatively smaller bizygo- 

 matic breadth in that sex. 



In deformed skulls the facial indices tend to be lower, owing to the 

 fact that the fronto-occipital compression has broadened the vault 

 and with it the bizygomatic diameter. 



FACIAL ANGLES 

 UNDEFORMED CRANIA 



DEFORMED SKULLS 



Florida 



Louisiana... 

 Arkansas... 

 Alabama.... 

 Tennessee.. 

 Mississippi. 



50.00 

 54.80 

 5L60 

 54.25 

 52.45 

 53.60 



The differences in the group as well as sex means are moderate, 

 irregular, and doubtless affected by uneven and mostly inadequate 

 numbers; but as the indices are they harmonize with those of various 

 other North American tribes ^ and show nothing special, aside per- 

 haps from the Texas females, which show the greatest alveolar protru- 

 sion. Sex differences are fairly evident, especially in the alveolar 

 angle — the females in general are somewhat more prognathic. 



The total facial and the alveolar angle appear to be, to a con- 

 siderable extent, independent of each other. 



There is no clear effect of the deformation on either of the angles. 

 In the best represented series in both categories the showings in the 

 deformed and the undeformed crania are practically identical. 



1 See Catalog, 1931. 



