THE INTESTINAL PROTOZOA OF FROGS AND TOADS, 255 
described appears to be neither truly mitotic nor truly 
amitotic, but rather of an intermediate type. 
The difference between the method of formation of the first 
spindle and that of the second pair in the cysts is as extra- 
ordinary as it is unaccountable. I cannot suggest even the 
slightest reason for it. 
In addition to the parasitic amceba found in the intestines 
of frogs and toads, one sometimes meets with another 
amoeboid organism, which differs in many respects from that 
just described. Asa result of culture experiments with the 
contents of the intestine, I am now convinced that this 
organism represents a phase in the life-history of the shelled 
rhizopod, Chlamydophrys stercorea Cienkowski, which I 
will now describe. JI may mention also, en passant, that 
minute Amcebe belonging to the limax-group also turn up 
frequently in cultures made from the feces. But then they 
are found quite commonly in organic infusions of almost any 
kind. Still, their presence, and that of leucocytes, offer 
difficulties to the investigator, and for that reason I mention 
the fact. 
(2) Chlamydophrys stercorea Cienkowski. 
Syn.: [ ? Difflugia enchelys (Ehrbg.) Cienkowski, 
1876]. 
Troglodytes zoster Gabriel, 1876. 
Platoum stercoreum (Cienkowski) Biitschh, 
1880. 
Leydenia gemmipara Schaudinn, 1896. 
Chlamydophrys  stercorea  (Cienkowski) 
Schaudinn, 1903. 
This very interesting rhizopod was first described and 
named by Cienkowski in 1876 (5). He says it is the same 
organism that Schneider! described under the name Difflugia 
enchelys Ehrbe., but I think there can be no doubt that it is 
not. D.enchelys Ehrbg., is really the same as Trinema 
* “A. Schneider, ‘ Muller’s Arch. Anat. Physiol.,’.1854, p. 191. 
