Mitochondria, Golgi Ajyparahcs, and Yolk. 133 



Chondriome means the entire mitochondrial content of the 

 cytoplasm, or the mitochondrial apparatus or complex looked upon 

 as a whole. This does not include the Golgi apparatus. 



Chromidiuin. — A granule or structure formed of substance 

 resembling the chromatin of the nucleus in its microchemical 

 reactions. It is well preserved in alcohol-acetic fixation, and 

 stains in basic dyes like methyl green and safranin ; it will not 

 impregnate in Cajal or Kopsch techniques {11), and goes blue 

 or green in Champy-Kull's method {18), or green in Bensley 

 Cowdry {18). 



Chromatic. — Used to describe any granule or structure which 

 stains heavily in any dye (also chromophile). 



Ghroniatinic. — Used to describe any granule or structure whose 

 microchemical characteristics are so similar to those of the chro- 

 matin of the normal nucleus as to lead to the belief that it is 

 formed of chromatin . 



Chromophobe. — Used to describe any structure which does not 

 stain by the usual methods. 



Cytoplasmic Inclusions refers to any granules or rods included 

 within the cell cytoplasm ; these may be classified under two sub- 

 heads as follows : — 



{a) Protoplasmic Inclusions refers to granules belonging 

 to either mitochondria or Golgi apparatus, or to isolated 

 granules known to be formed of protoplasm (e.g. chromatoid 

 body of cavy spermatids). 



(h) Deutoplasmic Inclusions refers to inert non-living 

 granules, such as fat, glycogen, or yolk, which are incapable 

 of binary or multiple fission, and which are not centres of 

 cytoplasmic activity in the same way as the protoplasmic 

 inclusions. 

 Deutoplasmagenesis is the process of formation of yolk spheres 

 or discs, fat, and glycogen within the egg during oogenesis. It 

 only includes the evolution of the mitochondria and Golgi appa- 

 ratus so far as they are directly concerned with the formation of 

 either yolk, fat or glycogen. (Also Vitellogenesis.) 



Golgi App)aratus. — This phrase was originally used for the 

 internal reticulate apparatus in the cells of nerve tissue prepared 

 by a formalin-silver nitrate technique. It is found, however,^ that 

 other somatic cells of all kinds, as well as germ cells, contain an 

 apparatus which exhibits the same microchemical reactions and 

 morphological arrangement as the Golgi apparatus in the nerve 

 ganglion cells. The Golgi apparatus has the following reactions : 



1. Black in Cajal's, Da Fano's, or Golgi' s special formalin 

 (uranium and cobalt nitrate, or arsenious acid) silver nitrate 

 impregnation methods {11). 



2. Black in Kopsch's or Mann-Kopsch's osmium tetroxide 

 methods {18). 



