208 REPORT ON AN ADDITIONAL COLLECTION OF SKELETAL 
іп some parts of the Western Hemisphere, particularly in Peru, the skulls from 
Arkansas and Louisiana show the following instances :' 
ARKANSAS LOUISIANA 
Males | Females Males Females 
No defects | 12 7 14 11 
2 9 7 
With defects | T 
Of the 22 skulls from Arkansas, defects in the floor of the meatus are present 
in three (— 14 per cent.); of the 55 skulls from Louisiana, such defects are found 
in 10 (— 29 per cent.). 
Taking into consideration the 10 Arkansas skulls described last year, and the 
30 additional skulls in the National Museum collections—a total of 62 from that 
State—a unilateral or bilateral dehiscence is present in 10, or 16 per cent. 
Unfortunately there are only 4 additional skulls from Louisiana in the Museum. 
Adding this number to those above given, it is found that of the 39 skulls from that 
State, 10 show a defect in the floor of the meatus, on one or both sides, or in 26 per 
cent. of the total. These figures indicate an excess of the abnormality in the 
Louisiana crania. 
As to sex, the abnormality is more frequent in the females. Of the 30 male 
skulls in the present series it occurs in 4, or 13 per cent.; while of the 27 females 
it exists іп 9, or 33 per cent. Taking all the available skulls from both Arkansas 
and Louisiana, aggregating 60 males and 47 females, 7 of the former, or approxi- 
mately 12 per cent., and 12 of the latter, or nearly 26 per cent., exhibit the condi- 
tion. These results illustrate that, at least in Arkansas and Louisiana, the defects 
of ossification in the floor of the auditory meatus are more than twice as common in 
the skulls of females as in those of males. 
Teeth. 
The condition of the dentition is shown in the table on page 209. 
There is only a single instance of a supernumerary tooth (see under Abnormal- 
ties of Teeth); and there are no pronounced defects in the form of the teeth remain- 
ing and in condition for examination. 
In szze the teeth in every case are moderate, not exceeding the average in 
whites. This applies to all except the third molars, which occasionally are small. 
(See the details following.) | 
More or less wear is exhibited in the teeth of all the skulls. It is evident that 
this process commences early in adult life, and occasionally before. No case of ex- 
treme wear came to notice. In a number of the crania the wear of the teeth is not 
uniform over the whole denture. 
" In 22 male and 10 female skulls from Arkansas of the old collections in the National Museum, 
such defects are as follows: No defects, М. 19, F. 8; small to moderate defects, M. 3, Е. 2. 2 
