336 
Races of Entamoeba histolytica 
at a difierent point: and if we apply the correction indicated in Part I 
of this paper, we get the following figures for the diameters of the hving 
cysts which occur with greatest frequency in each of these four races: 
Case H. 8, greatest frequency 6-Op., representing 6-6p for living cyst 
,, H* 7 ,, 5 , 7*5p ,, 8*3p ,, ,, 
„ E. 42 „ „ 12-Op „ 13-3p „ „ 
„ B. 1 ,, ,, 13-5p ,, 15-Op ,, ,, 
The figures calculated in this way for the living cysts were borne out 
by those which we had previously recorded after measuring a number of 
cysts in the fresh stools. These measurements were made durmg the 
ordinary routine examination of the stools of these patients, and are 
therefore based upon a comparatively small number of observations. 
Case H. 8, was recorded as having cysts about 6-5p in diameter; Case 
H. 7, small cysts, variable in size, usually about 8-9p; Case E. 42, cysts 
