LIFELESS MATTER BETWEEN CELLS. 



15 



Fig. 6 (After Schafer.) — Human cartilage (from head of metatarsal bone), c, cells; 



ni, lifeless matrix. (X 600.) 



Fig. 7. (Modified from Ran vier.)— Blood of frog, showing two forms of eells (cor- 

 puscles), one flattened and oval, one branched, floating in the lifeless plasma. 

 (X650.) 



