80 



PROTOZOOLOGY 



zoa (Hall, 1931; Hall and Nigrelli, 1937). The exact morphological 

 and physiological significance of these organellae and the relation 

 between them must be looked for in future investigations. Golgi 

 apparatus in Protozoa (Alexeieff, 1928; MacLennan, 1941; Grasse\ 

 1952). 



Chondriosomes 



Widely distributed in many metazoan cells, the chondriosomes 

 have also been recognized in various Protozoa. The chondriosomes 

 possess a low refractive index, and are composed of substances easily 



IIS 



Fig. 25. The Golgi bodies in Amoeba proteus (Brown). 



soluble in alcohol, acetic acid, etc. Osmium tetroxide blackens the 

 chondriosomes, but the color bleaches faster than in the Golgi bodies. 

 Janus green B stains them even in 1 : 500,000 solution, but stains also 

 other inclusions, such as the Golgi bodies (in some cases) and certain 

 bacteria. According to Horning (1926), janus red is said to be a more 

 exclusive chondriosome stain, as it does not stain bacteria. The 

 chemical composition of the chondriosome seems to be somewhat 

 similar to that of the Golgi body; namely, it is a protein compounded 

 with a lipoidal substance. If the protein is small in amount, it is 

 said to be unstable and easily attacked by reagents; on the other 

 hand, if the protein is relatively abundant, it is more stable and 

 resistant to reagents. 



The chondriosomes occur as small spherical to oval granules, rod- 



