PLATE XVI. 

 ORIGIN OF NEW CENTRES IN LIVING MATTER. 



The arrows show the direction in which nutrient fluids fiox 



Fig. 3. 



An elementary unit or cell. 

 Spherical particles of bio- 

 plasm. with smaller spherules 

 originating within them. 



Arrangement of particles 



of one of the smallest 



spherules re-presented in 



Fig- 1. 



IV. 



Bioplasm and formed material 

 of an elementary part like the 

 liver cell At the outer part the 

 formed material :s being resolved 



stituems. 



Bioplasm and formed material of ordinary tendon 

 ? ig- 5. jjig. 6. 



; 



"Diagram to illustrate the manner in which 



fatty matter and other substances are formed 



from bioplasm and afterwards accumulate 



in its central part. 



Diagram to illustrate the manner in which 



pores in certain vegetable cells and the 



" canaliculi " of bone are produced. 



Fig. 8. 





A cell or elementary part. a. Bioplasm, 

 6. Pabulum flowing in the direction indicated 

 by the arrows, traversing the formed material 

 and passing into the bioplasm, c. Youngest 

 formed material just produced ; c* Oldest 

 portion of formed material. 



Ideal drawing of a minute particle of bioplasm 



showing its component spherules of living 



matter and thin layer of soft formed material 



on surface undergoing change. 



[To face page 274. 



