4 



( 7o ) 

 TABLE XTII. 



Syst(;matic Survey of tKe five earliest evolntionary stages of the Human An- 

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

 of Systematic Evolution. 



Form-Valtie 



Of tlie 

 M.iRes of 

 body. 



five earliest 

 the animal 



Phylogeny. 



The five earliest 

 Ptiiges in the evolu- 

 tion of tbe tiibe. 



1. 



First Singe. 



A quite simple cytod 

 (a non-uuclealcd plos- 

 tid). 



2. 



Second Stnfre. 



A simple cell (a 

 nucleated plaslid). 



8. 



Third Stage. 



A quite simple :ig- 

 gropation of simple, 

 similar cells. 



Fourth Stane. 

 A simple hollow plobf^, 

 filled with liquid, ilie 

 wall of which con-'i-^ts 

 of a single stratum of 

 homogeneous cells. 



Fifth Stage. 



A hollow body, with 

 a single axis, tlio wall 

 of which consists of 

 different cell-strata ; 

 with an opening at one 

 pole of tbe axis. 



1. 



Monera. 



The oldest animal 

 Monera (originating 

 by spontaneous gene- 

 ration). 



2. 



Amoeba. 

 Oldest animal Amoeba. 



Synamceba. 



The oiliest ag^rejra- 

 tion of animal .Imwbee. 



Gastraea. 



Parent-form of in- 

 testinal animals, or 

 j)/. tazoa. Simple pri- 

 mitive intestine with 

 primitive mouth. The 

 budy-wall is formed 

 by the exoderm and 

 the entoderm. 



Ontogeny. 



The five earliest 

 stages in the evolu- 

 tion of the germ. 



Flanaea. 



An animal hollow 

 globe, the wall of 

 which consists of' a 

 single stratum of 

 ciliated cells. 



(blastceti,') 



1. 



Monerula. 



A non - nucleated 

 animal-egg (after fer- 

 tilization and alter 

 loss of the germ- 

 vesicle). 



2. 

 Cytula. 



A nucleated, ferti- 

 lized a)) i ma 1 -egg (" first 

 cleavage glubule "). 



3. 



Morula. 



" Mullieny-germ." 

 A globular mass of 

 cleavage-cells. 



4. 

 Blastnla. 



A hollow glohf^, the 

 wall of which consists 

 of a single strainm 

 of homogeneous cells 

 (the Plaiiula of lower 

 anim .Is). 



{Llastos'phara.) 



Gastrula. 



Intestinal lai^va. 



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 extanl 

 Monera. 



2. 



Amoeba. 



Extant Amoeba. 



3. 



Labyrinthula. 



A mass of similar, 

 one - celled primitive 

 animals. 



Magosphsera. 



A hollow globe, the 

 wall of which consists 

 of a single stratum of 

 homogeneous ciliated 

 cellB. 



5.. 

 Haliphysema. 



A quite simple plant- 

 nnimal. An unarticu- 

 lated uniaxial person, 

 the body-wall of wliich 

 consists of the exod'-rw 

 and the entoderm. 



