272 K. \v. HKC.NER. 



phora, van Oye noted 7 species of rhizopods, all shelled except 2 

 species of amoebae. He identified these as Centropyxis aculeata, 

 Difflugia constricta, Lesquereusia epistomium, Arcella vulgaris, 

 Cochlio podium bilimbosum, A mceba guttul-a, andAmceba nepenthesi. 

 Amoeba nepenthesi is a new species named by van Oye. It is 

 very small, with short, blunt pseudopodia and a body more or 

 less egg-shaped. Cysts of it were found which soon opened 

 when placed in a drop of water or in liquid from another plant, 

 and liberated the amoeba within. 



Protozoa are present in the pitcher liquid of Sarracenia 

 purpurea in nature. My examinations give only a general idea 

 of the protozoan fauna of the pitchers. Several pitchers were 

 examined from plants in the greenhouse of the university and 

 ten pitchers were examined from plants obtained at Salisbury 

 Cove, Maine. Organisms were looked for first in a sample of 

 the liquid with a binocular microscope; then all of the liquid was 

 centrifuged and the contents at the bottom of the centrifuge 

 tube was studied with a compound microscope; and finally 

 the debris at the bottom of the pitcher was examined. No 

 attempt was made to identify definitely the various organisms 

 encountered. Amoebae, flagellates and small ciliates were found 

 in the pitchers from Baltimore. Ten pitchers from Maine were 

 taken from different plants growing in separate localities. They 

 contained the following organisms. 



1. Young pitcher containing 9 cc. of milky liquid. Protozoa, 



few small flagellates resembling Cercomonas crassicauda; 

 insects, many ants, one house fly (?); insect larvae, living, 

 many; mites, one; rotifers, few. 



2. Young pitcher containing n cc. of clear liquid. Protozoa, 



few cercomonas-like flagellates; insects, many, badly 

 broken up; insect larvae, living, several. 



3. Mature pitcher containing 15 cc. of clear liquid. Protozoa, 



few cercomonas-like flagellates, several ridged flagellates, 

 several radiosa-like amoebae; insects, many, badly de- 

 cayed; insect larvae, several; mites, one; rotifers, few; 

 nematodes, many. 



4. Mature pitcher containing 7 cc. of milky liquid. Protozoa, 



many cercomonas-like flagellates; insects, many ants, one 



