lO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



ear; 52 other Peruvian crania of the collection showed 5 with ex- 

 ostoses (in all 12.82 percent). Regrettably, the rest of the data are 

 presented in a form that is difficult to understand, and there appear 

 to be some bad printer's errors. To his interesting discussion as to 

 the causation of these growths we shall return later. 



In 1930 two important contributions to the subject of ear exostoses 

 among the American aborigines are made independently by Oetteking 

 in New York and Alexander in Vienna. Oetteking (1930) studied 

 the skulls of the northwest coast of North America, Alexander (1930) 

 mainly those of Channel Islands, California. 



Oetteking's material is given in the table on page ii.° 



In addition to the above Dr. Oetteking examined 43 skulls of the 

 young, belonging to all the above series (including 10 Chinook), with- 

 out finding any exostosis. 



There is no discussion of the pathogeny of the tumors. 



Alexander, on a visit to the United States, examined 550 Indian 

 crania. His data are not given in as organized a way as would be 

 desirable. There is no information as to how many specimens were in 

 the dififerent groups involved, and there was no sexing. The total 

 number of skulls with ear exostoses was 30 (5.5 percent). A large 

 majority of the skulls, and also of those with exostoses, were from 

 California. The author adds an account of 21 (erroneously given as 

 22, nos. 3 and 15 being duplicates) cases of Austrian Whites with such 

 growths, and goes into a detailed discussion of the whole subject. 



In 1930, too, Moodie reports a case of ear exostoses in a California 

 Indian; and in 193 1 he mentions and illustrates, although with few 

 details and no discussion, six cases in the Peruvian skulls of my 

 San Diego collection, which doubtless had also been included in 

 Burton's report. 



The latest and among the most important contributions to the subject 

 of ear exostoses from the anthropological point of view is that of 

 Moller-Holst (1932). He examined 341 Chile-Bolivian skulls, of 

 which 57 (16.7 percent) showed ear exostoses. Strangely, a larger 

 proportion of these were in the undeformed crania (18 percent) than 

 in the deformed (14.8 percent). In 250 skulls of German Whites 

 there was but i case of exostoses. The author deals with the subject 

 comprehensively and with much detail. 



* Data in his memoir supplemented by Dr. Oetteking in correspondence and 

 arranged by the present writer. 



