THE CELL DOCTRINE. 117 



perfect cells by the usual production of formed mat- 

 ter on their periphery; that they do not originate 

 spontaneously, but from previously existing germi- 

 nal matter. So, too, " granules," if they be com- 

 posed of germinal matter, present the same attributes 

 and endowments, arising from previously existing 

 germinal matter, capable of growing, multiplying, 

 and assuming all the characters of fully formed cells, 

 but never originating spontaneously. Granules 

 otherwise composed are histolytic (rros, a tissue, 

 a breaking), and not histogenetic (c<m>s, a tissue, 

 creation), that is, they result from the breaking 

 down of tissue rather than go to building it up. 



