( 70 ) 



TABLE XTII. 



Systomatio Snryey of the five earliest evolutionary stages of the Haman Aiii 

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

 of Systematic Evolution. 



Form-Value 



Of the five earliest 

 Rtagea of the animal 

 bo47. 



1. 



Firtt Stage. 



A quite simple cjtod 

 (a non*nacleated plas- 

 tid). 



8«eond Sttige, 



A. simple cell (• 

 Ducleated plastid). 



Third Stage. 



A qnite simple ag- 

 gregation of simple, 

 similar oella.. 



1 



Fourth Stage. 



A simple boUow globe, 

 filled with liquid, the 

 wall of which consists 

 of a single stratum of 

 bomogeneeuB cells. 



Fifth Stage. 



A hollow body, with 

 a single axis, the wall 

 »f which consists of 

 different cell-strata ; 

 with an opening at one 

 pole of Um 



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 Amoeba. 



3. 



Synamoeba. 



The oldest aggrega- 

 tion of animal AmoelMe. 



4. 



Flansea. 



An animal hollow 

 globe, the wall of 

 which consists of a 

 single stratum of 

 ciliated cells. 

 (piaitcBO.') 



5. 



Gastrsea. 



Parent-form of In- 

 testinal animals, or 

 Mftazoa. 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. 



1. 



Monerala. 



A non - nucleated 



animal-egg (after fer- 



and after 



the 



tilization 

 loss of 

 vesiele). 



germ- 



I 



2. 



Cytnla. 



A nucleated, ferti- 

 lized animal-egg (" first 

 cleavage globule "). 



3. 



Morula. 



•• Mulberry-germ." 

 A globular mass of 

 cleavage-cells. 



4. 



Blastnla. 



A hollow globe, the 

 wall of which consists 

 of a single stratum 

 of homogeneous cells 

 (the Planula of lower 

 animals). 



(blastosptuera.) 



5. 



Oastmla. 



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. 



Protamoeba, Bathy- 

 bius, and other extant 

 Monera. 



2. 



Amoeba. 



Extant Amoiba. 



L^byrinthnla. 



A mass of similar, 

 one - celled primitive 

 animals. 



4. 



Magosphaera. 



A hollow globe, the 

 wall of which consists 

 of a single stratum of 

 homogeneous ciliated 

 cells. 



5. 



Ealiphysema. 



A quite simple plant- 

 animal. An unarticu- 

 lated uniaxial person, 

 the body-wall of which 

 consists of the exoderm 

 and the entoderm. 



