- 7 - 



From the sm of these obsermtions it is evident that this body con- 

 sists of two substances and that one of these is proteinaceous and the other 

 tannic in character. 



Finally, it is to be noted that in the neighborhood of this body may 

 frequently be found numerous spherical corpuscles, isolated or in groups, 

 endowed with Brownian movement. They are almost invisible in indifferent 

 solutions, and may be observed in sections treated with proper reagents. 



T,'ith osmic acid, in fact, they turn black; with bichromate of potash 

 and chromic acid they become intensely brown; with iron acetate and iron 

 chloride they take on an obscure blue color; they show, moreover, all the 

 reactions of tannin, and it is here, probably, that they will be found re- 

 lated to the body under examination and i^tbh represents the products of 

 its activity. 



Origin and Morphologic and Biologic Significance 

 of the Cellular Bodies under Examination. 



The, protoplast in the course of its fimctional activity, as has been 



noted, produces often by neoplasia the more important bodies to which belong, 



according to the results of the history of their development above described, 



also the body in question. 



As far as concerns its morphologic significance, its method of 



multiplication, chemical composition, and the morphologic characters which 



this body presents, the idea that it may have some connection with chroma- 



tophores is to be excluded; for, I believe that especially because of the 



presence of tannin, it should be considered related to cyanoplasts Q) and 



because of the presence of the vesicle of tannin by which it is to be 



distinguished by its reaction from proteii^ceous substances which show more 



evidently, and because of the special biologic function which it may perform, 



it should be considered related to cyanoplasts. 



