THE BEGINNINGS OF LIFE. 



existed, and which was fringed externally by adherent 

 and unmetamorphosed green corpuscles (>). In other 



FIG. 93. 



Transformation of a mass of Chlorococcus Corpuscles into the so-called 

 'winter-egg' of Hydatina senta. (X 250.) 



a. Ovoid mass of bright-green Chlorococcus corpuscles, about - s ^ s " in 



long diameter. 



b. Such a mass after its transformation into a brown granular body, 



without distinct bounding wall. (Should have been intermediate 

 in tint between a and c.) 



c. A similar body at a later stage, when a limiting envelope has made 



its appearance, upon which villous outgrowths had been produced. 



d. Later stage, constituting the so-called ' winter-egg ' of Hydatina. 



e. Hydatina senta which is produced from such a body almost adult. 



specimens the first traces of a bounding membrane 

 appeared, though such bodies were still more or less 



