38 Field Columbian Museum — Anthropology, Vol. II. 



mandibular angle. The mental spines are, as a rule, very faintly 

 marked. The most striking feature, perhaps, of the whole series is 

 the roughened masseter surface, which, at times, becomes a veritable 

 outward projecting crest at the base of the ramus. This is more 

 noticeable in the males than in the females. 



Teeth. — In four male skulls and in six female skulls it was possi- 

 ble to compute the dental index, after the method of Prof. Flower.* 

 The average for the males is 41, with a maximum of 43 and a mini- 

 mum of 40; the average index for the female series is 45, with a 

 maximum of 49 and a minimum of 42. The mean general index for 

 the series is 43. As the female series is the larger, and hence more 

 accurate, and as Prof. Flower has shown that there is an average of 

 only two points, or even less, between the two sexes, it is highly 

 probable that the mean general index in this series is too low, and 

 that the index of 44 would be more accurate as an index for the 

 group. As it is, the males are in the microdont and the females in 

 the megadont division. 



It is a somewhat significant fact that in no skull is there a single 

 unsound tooth, and only in two skulls have any teeth been lost dur- 

 ing life. The teeth are invariably good sized, well formed and gen- 

 erally in perfect alignment As has been described in the preceding 

 section, in two of the lower jaws there is a supernumerary molar, and 

 in three skulls one or both pairs of the third molars have been sup- 

 pressed. These I have commented upon more fully elsewhere, -j* 

 The wear of the teeth has been almost nil; in only one case could the 

 wear be said to correspond to No. 2 of Broca's scale. 



Sutures.— The sutures are, as a rule, exceedingly simple. Occa- 

 sionally, however, the sagittal or lambdoidal suture is very coarsely 

 serrated. In all the skulls there is a gradually increasing amount of 

 complexity in the serration beginning with the coronal and ending 

 with the lambdoidal. There is but little evidence of synostosis, no 

 suture being entirely effaced, and only a very few showing any signs 

 of synostosis at all. Wormian bones occur rather frequently in the 

 lambdoidal suture, the largest one measuring 25x30 mm. The larg- 

 est spheno-parietal suture is 19 mm. In two instances pterion is 

 formed in K. In four it is pterion " retourne " — always by a frontal 

 process from the temporal bone; in four other crania epipteric bones 

 occur at pterion. Thus only one-half of the entire series have pterion 

 formed in the usual manner, in H. 



*On the Size of the Teeth as a Character of Race. Journal of the Anthrop. Inst., Nov. 1884. 

 t "Numerical Variations in the Molar Teeth of Fifteen Papuan Skulls." Dental Review, 

 April, 1897, Chicago. 



