SARCODINA, PROTEOMYXA 



331 



in fresh water. On coming in contact with an alga, it often travels 

 along it and sometimes breaks it at joints, or pierces individual cell 

 and extracts chlorophyll bodies by means of pseudo podia; multipli- 

 cation in encysted condition; 30-40/x in diameter. 



Genus Nuclearia Cienkowski. Subspherical, with sharply pointed 

 fine radiating pseudo podia; actively moving forms vary in shape; 



Fig. 154. a, Labyrinthula cienkowskii, X200 (Doflein); b-e, Laby- 

 rinthomyxa sauvageaui (b, c, flagellate forms, XlOO; d, e, amoeboid 

 forms, X500) (Duboscq); f, g, Pseudospora volvocis, X670 (Robert- 

 son); h-j, Protomonas amyli (Zopf);k, 1, Vampyrella lateritia, X530 

 (k (Leidy), 1 (Doflein)); m, n, Nuclearia delicatula, X300 (Cash). 



with or without a mucous envelope; with one or many nuclei; fresh 

 water. 



N. delicatula C. (Fig. 154, m, n). Multinucleate; bacteria often 

 adhering to gelatinous envelope; up to 60^ in diameter. 



