94 J. W. JENKINSON. 



1. Do nuclei exist ? 



2. What are the " spindles" ? 



3. Are the yellow-green bodies chromatopliorcs or symbiotic 

 Algae? 



4. What are the red bodies ? 



5. Is '' diffuse chlorophyll" present? and — 



6. What is the systematic position of the organism ? 



The following is an enumeration of the cell-contents accord- 

 ing to Hieronymus : 



1. The Nuclei. — Of these there is only one in the quite 

 young cystS; in larger and older cysts two or more, and in the 

 largest several ; and conversely in those amoebae which have just 

 left the cyst there are many nuclei, in the final products of 

 division only one. 



3. The Chromatophores. — These contain a green pigment, 

 probably identical with chlorophyll, and a yellow-brown pig- 

 ment. During the period of ingestion they fade. 



3. Oil Bodies. — These are of a red colour, sometimes olive- 

 green or blackish brown. They are formed from aggregations 

 of dead chromatophores, and can be artificially produced in 

 sunlight. They are egested by the araoebse, and often left 

 behind in the cyst. 



4. liod-shaped crystalline bodies of calcium oxalate ; 

 they are formed in the hyaloplasma or in the cell-sap, and 

 exhibit Brownian movements in the vacuoles. 



5. A vacuolated hyaloplasma, containing — 



6. Granular or drop-shaped bluish, highly refractile cor- 

 puscles, deeply staining in the living cell, and identical with 

 Archer's spindles and Crato's physodes. 



