HRDLi<?KA] SKELETAL EEMAINS OF EAELY MAN 329 



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The frontal sinuses themselves differ somewhat on the two sides. 

 On the right there is only one large cavity with a sHght indication of 

 a dividing septum; on the left there are a more median, antero- 

 superior, partial septum, and another more complete wall about 

 3 cm. from the median line, in all three imperfectly separated spaces. 

 The more median chamber on the left measures approximately 

 3 + cubic centimeters (15 by 15 by 20 mm.) in capacity and that on 

 the right was even more spacious. 



The supraorbital ridges arch, as already mentioned, over the 

 median half of the supraorbital space on each side, following quite 

 closely the curve of the orbital borders, exactly as in many modern 

 Indian skulls. The ridges are prominent but not at all comparable 

 with the heavy supraorbital welts of the Neanderthal and Spy skulls 

 or even with those of some of the Australians. Their prominence is 

 due not to size or massiveness but to the protrusion of the median 

 parts of the outer wall of the frontal, caused by the large frontal 

 sinuses. They would be regarded as quite ordinary in a masculine 

 skull with fuller forehead. They are equaled and exceeded in some 

 masculine crania of the modern Indian and occasionally even in those 

 of whites. 



The supraglabellar plane offers no extraordinary feature except 

 that it is somewhat better marked than usual, owing to the prom- 

 inence of the subjacent glabellar region. It is entirely human and 

 modern in character, and the same is true of the moderate depression 

 above the supraorbital ridges. 



The distal halves of the supraorbital borders are normally formed; 

 they are not massive or sharp, just ordinary. There is only a vestige 

 of the supraorbital arch of the lower Primates, as usual in well- 

 developed modern human crania. The planum supraorhitale is well- 

 defined, smooth and slanting, precisely as in many modern masculine 

 Indian skulls. In the lower Primates, especially in the adult males, 

 tliis region is contracted, more or less deficient, and radically unlike 

 that in man. 



The lower portion of the cerebral part of the frontal is wdde, wider 

 than the average in the Indian, the diameter frontal minimum meas- 

 uring 9.8 cm. This is surely no sign of primitiveness or inferiority. 



The forehead is somewhat low and sloping as compared with well- 

 developed skulls of the whites but is not exceptional if compared with 

 the average masculine crania of Indians, particularly those of the 

 dolichocephalic type. A number of modern Indian skulls were shown 

 by the Avriter in his report relating to man's antiquity in North 

 America ^ with lower and more sloping foreheads than in the Dipro- 



i Skeletal Remains Suggesting or Attributed to Early Man in North America {Bulletin 33 of the Bureau 

 of American Ethnology, p. 99 et seq. and pis. xn-xxi). 



