268 



PROTOZOOLOGY 



Fig. 110. a, b, Rhizochrysis scherffeli, X500 (Scherffel). a, 4 chroma- 

 tophore-bearing individuals and an individual without chromatophore; 

 b, the last-mentioned individual after 7 hours, c, d, Chrysarachnion insi- 

 dians (Pascher). c, part of a colony composed of individuals with and 

 without chromatophore, X1270; d, products of division, one individual 

 lacks chromatophore, but with a leucosin body, X2530. e, f, Chrysothy- 

 lakion vorax (Pascher). e, an individual with anastomosing rhizopodia and 

 "excretion granules," XS70; f, optical section of an individual; the cyto- 

 plasm contains two fusiform brownish chromatophores, a spheroid 

 nucleus, a large leucosin body and contractile vacuole, X about 1200. 



