204 ROBERT BENNETT BEAN 



Resume of the total ear dimensions: The ears of the white men 

 are longer than those of the negro men and of about the same 

 breadth. The ears of the negro women are about the same 

 length as those of the negro men but not so broad. The ears of 

 the white men are long and narrow, the ears of the negro men 

 are relativel}^ short and broad, the ears of the negro women are 

 relatively short and narrow and the ears of the Filipinos are short 

 and narrow, relatively narrower than any of the others. The 

 ears of the white men are large, the ears of the negro men and 

 women are small, those of the negro women smaller than those of 

 the negro men, and the ears of the Filipinos are smaller than any 

 of the others, the ears of the Filipino women are the smallest of 

 all. 



Morphologic index: Schwalbe (15) introduced an index of the 

 ear which is obtained by dividing the ear base by the true ear 

 length. Taking a series of mammals up to man this index in- 

 creases from 27.6 in the antelope through the kangaroo 33.0, 

 the lemur 76.0, the monkey 84.0-93.0, the chimpanzee 105.0, 

 the orang 122.0, the gorilla 125.0, the negro women of New Or- 

 leans 172.67, the negro men of New Orleans 177.9, to the white 

 men of New Orleans 180.2. The Filipino men have an index 

 of 188.9 and the Filipino women 193.96. The index of the 

 Bavarians is 122.0, Great Russians 139.8, Kalmucks 140.6, and 

 Ainos 171.5 (13). The morphologic index is vitiated by the 

 difficulty of finding Darwin's tubercle in a large number of ears. 

 Martin (13) considers the index of doubtful value. The variabil- 

 ity is very great, 83.7 to 195^5 in Alsatian men, 97.3 to 189.5 

 in Alsatian women, 110.0 to 223.0 among the Ainos, and 133.0 

 to 255.0 among the negro men of New Orleans. 



Concha. Measure^nents and indices 



Length: The length of the concha is 24.79 mm. in 56 ears of 

 the white men, 24.25 mm. in 115 ears of the negro men, 24.04 

 mm. in 29 ears of the negro women, 24.62 in 80 ears of the Fili- 

 pino men and 23.57 mm. in 14 ears of the Filipino women. 



Breadth: The breadth of the concha is 19.14 mm. in 56 ears 

 of the white men, 20.01 mm. in 115 ears of the negro men, 19.24 



