HRDLlCKA] 



SKELETAL REMAINS 



95 



illustrations (plates xn, a, xm, a; figures 13-16) will show better 

 than additional words could the type of these crania and their rela 

 tion to the specimens from the mound in Nebraska. 



FIG. 15. Antero-posterior arcs of skulls no. 242982, U. S. National Museum, and no. 6, 

 Gilder mound. No. 242982, ; no. 6, __. .__. 



FIG. 16. Antero-posterior arcs of skulls no. 242982, U. S. National Museum, and no. 8, 

 Gilder mound. No. 242982, ; no. 8, 



Still other specimens of low-type Indian crania may be adduced 

 in this connection. Low forehead, or the absence of the frontal 

 vaulting, occurs in rare instances mainly in consequence of an appar 

 ently natural increase in volume of such sexual characteristics as the 

 supraorbital ridges in males among even the other class of mound 



