256 CG. CLIFFORD DOBELL. 
acinus Duj., described by Dujardin, Claparéde and Lach- 
mann, F, HE. Schulze, and others (see their descriptions and 
figures). In the very same year that Cienkowski’s work 
appeared a remarkable account of an organism, named Trog- 
lodytes zoster, was published by Gabriel (19). From his 
description I feel almost convinced that he really observed the 
same organism. This work is remarkable in that it anticipates 
the discovery of many of the stages in the life-history of this 
animal, with which we have since become acquainted through 
the labours of Schaudinn (43). Unfortunately Schaudinn’s 
full description never saw the light, so that for the present 
our knowledge rests upon his lucid but brief preliminary 
paper. Many points still require confirmation, therefore; for 
instance his statement of itsidentity with Leydenia gemmi- 
para Schaud., the amceboid organism described by Leyden 
and Schaudinn (36) in ascitic fluid. ‘aking the results of 
Cienkowski, Gabriel and Schaudinn together, we appear now 
to have a fairly perfect knowledge of the life-cycle of 
Chlamydophrys. Nevertheless, as the work requires ‘con- 
firmation I think my observations may not be superfluous, 
According to Bitschh (8) Chlamydophrys is a synonym 
for Platoum F.E.S. But this is really a free-living form, 
similar to, but not the same as, Chlamydophrys. 
As is well known, Chlamydophrys is an animal which 
lives in the feces of various animals, the cysts passing along 
the alimentary tract before they undergo development. It is 
still unknown whether the formsof Chlamydophrys found 
in the feces of different animals represent one species or 
several. ‘This can be decided only by further research. 
I have found the organism in Rana temporaria and 
Bufo vulgaris, but not frequently. In both the animal 
appears to be identical. 
Schaudinn was the first to observe that the animals might 
escape from their cysts in the form of an amoeba before 
leaving the intestine of the “host.” This happens only 
occasionally, 
The Chlamydophrys amebe, which I have found in the 
