( 70 ) 

 TABLE XVII. 



Systematic Survey of the five earliest evolutionary stages of the Human An- 

 cestral Line, compared with the five earliest stages of Individual and 

 of Systematic Evolution. 



Form-Value 



Of the five earliest 

 stages of the animal 

 body. 



First Stage. 



A quite simple cytod 

 (a non-nucleated plas- 

 tid). 



Second Stage. 



A simple cell (a 

 nucleated plastid). 



Third Stage. 



A quite simple ag- 

 gregation of simple, 

 similar cells. 



Fourth Stage. 



A simple hollow globe, 

 filled with liquid, the 

 wall of which consists 

 of a single stratum of 

 homogeneous cells. 



Fifth Stage. 



A hollow body, with 

 a single axis, the wall 

 of which consists of 

 different cell-strata ; 

 with an opening at one 

 pole of the axis. 



Phylogeny. 



The five earliest 

 stages in the evolu- 

 tion of the tribe. 



1. 

 Monera. 



The oldest animal 

 Monera (originating 

 by spontaneous gene- 

 ration). 



2. 



Amoeba. 

 Oldest animal Amceba. 



Synamoeba. 



The oldest aggrega- 

 tion of animal Amoeba?. 



4. 

 Planaea. 



An animal hollow 

 globe, the wall of 

 which consists of a 

 single stratum of 

 ciliated cells. 



(blastcea.') 



5. 

 Gastraea. 



Parent-form of in- 

 testinal animals, or 

 Mttazoa. Simple pri- 

 mitive intestine with 

 primitive mouth. The 

 body-wall is formed 

 by the exoderm and 

 the entoderm. 



Ontogeny. 



The five earliest 

 stages in the evolu- 

 tion of the germ. 



Monerula. 



A non - nucleated 

 animal-egg (after fer- 

 tilization and alter 

 loss of the germ- 

 vesicle). 



2. 



Cytula. 



A nucleated, ferti- 

 lized animal-egg (" first 

 cleavage globule "). 



3. 

 Morula. 



" Mulberry-germ." 

 A globular mass of 

 cleavacre-cells. 



4. 



Blastula. 



A hollow globe, the 

 wall of which consists 

 of a single stratum 

 of homogeneous cells 

 (the Planula of lower 

 animals). 



(blastosphcera.) 



Gastrula. 



Intestinal larva. 



A simple intestinal 

 cavity with a mouth- 

 opening. The body- 

 wall is formed by the 

 two primary germ- 

 layers. 



The System. 



The five earliest 

 stages in the animal 

 system. 



1. 



Monera. 



Protamceba, Bathy- 

 bius, and other extant 

 Monera. 



2. 



Amoeba. 



Extant Amceba. 



3. 



Labyrmthula. 



A mass of similar, 

 one - celled primitive 

 animals. 



Magosphaera. 



A hollow globe, the 

 wall of which consists 

 of a single stratum of 

 homogeneous ciliated 



cells. 



5. 

 Haliphysema. 



A quite simple plant- 

 animal. An unarticu- 

 lated uniaxial person, 

 the body-wall of which 

 consists of the exoderm 

 and the entoderm. 



