ON THE STAGES OF EVOLUTION 217 



given to its "first created" particles, and transmitted to 

 individual organised entities. 



After, and out of, protoplasm, are elaborated the indi- 

 vidual organic units known, as cell (see Fig. 72), and multi- 



Zf. 



FIG. 77. SECTIONS OF THE OVUM OF THE RABBIT DURING THE LATER 

 STAGES OF SEGMENTATION, SHOWING THE FORMATION OF THE 

 BLASTODERMIC VESICLE. (E. v. Beneden.) 



a, section showing the enclosure of entomeres by ectomeres except at one spot the 

 blastopore ; b, more advanced stage in which fluid is beginning to accumulate 

 between entomeres and ectomeres, the former completely enclosed ; c, the fluid 

 has much increased, so that a large space separates entomeres from ectomeres 

 except at one part ; d, blasted ermic vesicle, its wall formed of a layer of ecto- 

 dermic cells, with a patch of entomeres adhering to it at one part ; z.p , ecr., ent., 

 as before. 



cell (see Fig. 76), creatures vegetable and animal, whose 

 vital energy, or life, although indistinguishable from nerve 

 energy, is molecularly generated, stored and operated, 

 without the intervention of a nervous system properly 

 so called, but, necessarily, a molecular, or non-cellulo-fibral, 

 nervous system ; indeed, in the multi-cell creature, a 



