| HRDLICKA] SKELETAL REMAINS 
95 
illustrations (plates xm, a, xu, 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. 
Fie. 15.—Antero-posterior arcs of skulls no. 242982, U. S. National Museum, and no 
Gilder mound. No. 242982, s'm10:;10; 
~ = 
_——. oe 
—~—.-- 
Fic. 16.—Antero-posterior ares of skulls no. 242982, U. S. National Museum, and no. 8, 
Gilder mound. No. 242982, ———; 
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 
