70 



PROTOZOOLOGY 



quently the cortical layer is of unequal thickness, and, therefore, 

 crescentic forms appear. Ringform apparatus was noted in Chilo- 

 donella and Dogiella by Nassonov and network-like forms were 

 observed by Brown in Pyrsonympha and Dinenympha. The 

 numerous observations on the Golgi apparatus of Protozoa as 

 well as of Metazoa, indicate that it is composed of a lipoidal ma- 

 terial in combination with a protein. 



In line with the suggestion made for the metazoan cell, the 

 Golgi apparatus of Protozoa is considered as having something 

 to do with secretion or excretion. Nassonov considers that osmio- 

 philic lipoidal substance, which he observed in the neighborhood 

 of the walls of the contractile vacuole and its collecting canals 

 in many ciliates and flagellates, is homologous with the meta- 



