THE BEGINNINGS OF LIFE. 



405 



Fig. So. 



Higher Transformations of the substance of Nitella. ( x 600). 



a. A hirge Amoeba resulting from the transformation of a single 



embryonal sphere. 

 h. Form of Actinophrys which such an Amoeba may subsequently assume. 



c. Small embryonal mass which has assumed an ovoid form, and sub- 



sequently becomes concerted into a kind of Paramecium (c'). 



d. Similar mass, rather larger, which becomes flattened, and subse- 



quently develops into an embryo Chilcdon id'^. 



e. A complex egg-like body into which individual embiyonal spheres were 



very prone to develop ; the central mass of protoplasm containing 



large gmnules and a vacuole. 

 /. Later stage of same body — central mass of fatty-looking globules, 



which subsequently becomes homogeneous and enclosed within 



another cyst, as in g. 

 h. Later stage of development as seen in a few embryos, which may or 



may not have escaped from their loose outer envelope. 



8. On Other occasions nearly all the embryonal 

 spheres within a given internode may, almost imme- 



