28 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 72 



doctor before entering" the area and again on leaving it. Work here 

 was finished on July 14, 1920, after which Mr. Raven returned to the 

 United States, sailing from Cairo, September 2. and arriving in New 

 York, September 17. 



^w 



Fig. 39. — A Dinka woman and her child at Shambe 

 on the upper Nile. It is a rather common sight to 

 see the natives cleaning their teeth with a bit of stick. 

 Sometimes thej- pound the end or split it with a knife 

 so that it becomes bru^hlike. 



Though not numericall}- large the collections are of unusual interest 

 on account of the manner in which they supplement those obtained 

 by other expeditions in which the Smithsonian Institution has been 

 interested. Among the most important material may be mentioned 

 697 mammals (including 272 specimens from South Africa, a region 

 hitherto very imperfectly represented in our collections; 152 from 



