INDIAN TRIBES OF NORTHERN MATO GROSSO, BRAZIL — OBERG 



129 



Map 3.' — Schematic map of approximate tribal locations in relation to topography and drainage systems in northern 

 Mato Grosso. Dotted lines indicate tribal boundaries at time of contact (after Steward and Mason, 1950). Hachures 

 indicate the general conformation of the Planalto do Matogrosense. Tribes: 1, Bororo; la, Umotina; 2, Nambicuara, 

 3, Iranxe; 4, Upper Xingd tribes; 5, Paressi; 6, Bacairi; 7, Caraja; 8, Tapirap6; 9, Cayap6. Drainage systems (simpli- 

 fied): A, Upper Xingd; B, Upper Paraguay; C, Paratinga- Verde; D, Arinos-Papageio ; E, Guapore; F, Gy-Parapa; 

 G, Theodore Roosevelt; H, Araguaia. 



of the Upper Xingu Basin, lived the Bororo. 

 With the Guat6 and others, the Bororo occupied 

 the headwaters of the Upper Paraguay River. As 

 a Bororo subtribe, the Umotina formerly lived be- 

 tween the headwaters of the Upper Paraguay and 

 Sepotuba rivers (Lowie, 1946, p. 419). The Sao 

 Lourenco group of Bororo, measured by Ehren- 

 reich, inhabited the upper and middle reaches of 

 the Sao Lourenco River. 



To the east of the Upper Xingu Basin, along the 

 Araguaia River, are the Caraja. They are in- 

 cluded in this analysis less for their geographic 

 position than for their metric similarity to the 

 Umotina. 



APPRAISAL OF MIXTURE 



Oberg (personal communication) has indicated 

 that no subject with detectable neo-Brazilian 

 admixture was included in the series. The 

 Eastern Nambicuara have had occasional contact 

 with neo-Brazilians only since 1912, and appreci- 

 able mixture is most unlikely. While the Umotina 

 have been peaceable only since 1913 (Lome, 

 1946, p. 419), Oberg indicated there is a possibility 

 of some neo-Brazilian admixture there, but that 

 such admixture could hardly account for their 

 extreme long-headedness (mean male cephalic 

 index 73.0). This is most reasonable since 



