TABLE XXII. 



Systematic Survey of the Periods in the Tribal History of the 



Human Race. 

 (Compare Table VIII., vol. i. p. 402.) 



FIRST MAIN PERIOD IN TRIBAL HISTORY. 



The Flastid Anoeston of Man. 



The form of the ancestors of man is equal to the simple indiyidiuJ of ikt 

 flirit order, • single plastid. 



First Stage : Moneron Series (Fig. 163, p. 46). 

 The ancestors of man are single, living, simple cytods. 



Second Stage : Amoeba Series (Fig. 167 p. 68). 

 The ancestoi's of man are single, living, nniple cells. 



SECOND MAIN PERIOD IN TRIBAL HISTORY. 



The many-celled Primitive Animal Ancestors of Man. 



The ancestors of man consist of a closely -united society of many homo- 

 geneous cells ; hence their form-value is that of individuals of the second 

 order, of Idorgana. 



Third Stage : Synamoeha Series (Fig. 170, p. 56). 



The ancestors of man are many-celled primitive animals of the simplest 

 kind : solid masses of simple, homogeneous cells. 



Fourth Stage : Flanssa Series (Figs. 172, 173, p. 60). 



The ancest« )rs of man are many-celled primitive animals of a charactei 

 like that of the Magosphcera and certain planula-larvsa, of equal rank with 

 the ontogenetic Blastula or BlastosphoBra ; hollow spheres, the wall of which 

 cunsists of a singlt stratom of ciliated cells. 



