148 Shells as evidence of the Migrations. 
on the western shore of Lake Tanganyika, they were seen 
by Richard as head-ornaments or sewn on straps ; he also 
observed them in use by the Nollo Nollo, living north 
thereof, to ornament the forehead, neck and wrist; in 
the latter case, two shells were worn attached to the 
middle of a thin strap, probably an amulet of some kind. 
Among the Warua of the Upper Congo similar ornaments 
were noticed.” 
On the middle Congo cowries are a recognised cur- 
rency about Lukolela, Ngowe, Matumba Lake, etc., being 
used by the Balolo people. On the Mongalla, Thonner, 
in 1896, found cowries the necessary legal tender for con- 
tinuing his journey up the river and for the purchase of 
food-stuffs. Wissmann, Wolf, and other travellers found 
them highly estimated in the MKassai-Sankuru_ basin. 
According to Wolf, in 1885, these shells together with a 
black and white striped glass bead were used as barter- 
material by the Baluba people of this region.” 
In the Lunda Empire, the wooden plug set with 
cowries at both ends, which the Wavira wear in their ears, 
is hung by a string from the neck as an amulet.” 
According to Magyar, cloth in Kimbundaland, about 
1850, was reckoned at from 25 to 50 cowries, or busio- 
shells, per ell or yard, according to the distance from the 
coast ; and this same observer tells us that the women of 
the Mondumbe, inwards from Benguela, ornament their 
hair with small white cowries (C. moneta ? Oliva ?).™ 
In describing the Ovambo, Ratzel (ef. c24, ii, p, 541) 
informs us that they barter ivory for beads, iron, copper, 
shells, and cowries, with the Portuguese-speaking black 
traders on the further side of the Cunene River. Such 
*® Schneider, of. cz/., various pages, 
*8 Shi. 
*? Ratzel, of. ci/., iii, p. 69. 
* Schneider, of. c#/., pp. 159 and 172, 
