HISTORICAL. 9 



to the one producing dysentery he gave the name 

 ff Entamceba Mstolytica" To this investigator un- 

 doubtedly belongs the credit of the establishment, 

 upon scientific grounds, of two species of amoeba in- 

 festing the intestine of man. 



In 1905, while serving at the U. S. Army General 

 Hospital in San Francisco, California, where there 

 was always abundant material for the study of 

 amoebic dysentery, I was able to partially confirm 

 Schaudinn's results and later was able to entirely 

 confirm and add to them. 



For a long time Schaudinn's work was received 

 with doubt, but at the present time almost every 

 authority, who has had any experience in the study 

 of these organisms, has accepted Schaudinn's clas- 

 sification, and in the recent work of such zoologists 

 as Liihe, Braun, Hartmann, Minchin, Stiles, Wen- 

 yon, Doflein, and Calkins, this classification has re- 

 ceived complete recognition, while confirmatory 

 papers have been published by Hartmann, Werner, 

 Viereck, Jurgens, Kartulis, Simon, Wenyon, Fan- 

 tham, and many others. 



The work of Schaudinn had the effect of stimu- 

 lating anew the study of the amoebae parasitic in man 

 and since his paper appeared several new species 

 have been described. It is probable that only a few 

 of these are entitled to specific rank, but they will 



