186 REPORT ON AN ADDITIONAL COLLECTION OF SKELETAL 
The Form of the Louisiana Skulls.—Yn form the Louisiana crania show a pre- 
dominance of the same brachycephalic type as that of the majority of skulls from 
Arkansas; but there are likewise some more oblong heads, which are similar in 
their turn to those of like form from Arkansas. The longer forms appear among 
the non-deformed Louisiana skulls, and are suspected also in several of the deformed 
crania, Besides these two types there are undoubtedly also intermediate forms 
resulting from admixture. 
The height of the skulls for the greater part is quite considerable, as is the 
case with the skulls from Arkansas. 
The principal measurements with reference to the form of the crania are given 
on p. 185. 
Two features shown by the preceding table, which deserve special notice are 
the height-length and height-breadth indices. The former index averages 82.7 in 
the males, and 84.3 in the females; the latter 102.2 in the males, and 99.1 in the 
females. All of these averages, but particularly those of the height-length index, 
are extraordinarily high and are met with even among the Indians only in certain 
restricted areas. 
Lhe Size of the Louisiana Skulls—In size there is again a fair agreement 
between the crania from Louisiana and those from Arkansas. A number of the 
‘male skulls and one female specimen show, as seen from the following table, very 
fair capacity (between 1500 and 1600 с.с.); but there are also crania, both male 
and female, of but very moderate capacity. In the case of female skull 255.208 
the capacity is decidedly small, though such examples are not uncommon in the 
American race. The average capacity of the twelve male crania is 1460 (1350-1580) 
с.с.; that of the 7 female skulls, 7270 (1130-1390) с.с. In comparison with this, all 
the available Arkansas crania the capacity of which could be determined, comprising 
19 males and 14 females, give an average of 1455 (1260-1670) c.c. for the males 
and 7255 (1140-1395) c.c. for the females. The differences between the two areas 
are not very material, but, so far as they obtain, they favor Louisiana. They are 
noticeably more pronounced in the females than in the males. This interesting 
condition may be incidental to the small number of specimens, particularly in the 
series from Louisiana; yet it deserves attention. Similar differences are noted in 
all the measurements bearing on the size of the vault in the two series of skulls, 
The percental relation between the capacity of the female and that of the male 
crania, the latter being taken as 100, amounts in Louisiana to 89.7, in Arkansas to 
86.3. This shows that the female skulls in these groups are not only absolutely 
larger in Louisiana than in Arkansas, but that they are also relatively larger, when 
compared with the males, than they are in the other State. This rather strengthens 
the possibility that the high average capacity of the Louisiana female skulls is 
accidental. 
The percentage of difference between the capacity of the male and female 
crania is higher than that shown by any other of the principal external measure- 
ments of the vault. This will be shown more clearly in the succeeding pages. 
