SYNOPSIS 



A. AN ACCOUNT OF THE STRUCTURE, PHYSIOLOGY, 

 AND- LIFE-HISTORY OF A SERIES OF TYPICAL 

 ORGANISMS IN THE ORDER OF INCREASING 

 COMPLEXITY. 



I. THE SIMPLER UNICELLULAR ORGANISMS. 

 I Amceba. 



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Cell-body amoeboid or encysted : cell-wall nitrogenous (?): 

 nutrition holozoic : reproduction by simple or binary 

 fission I 



2. Hcematococcus. 



Cell-body ciliated or encysted : cell-wall of cellulose : 

 nutrition holophytic : reproduction by binary fission . . 23 



3. Heteromita. 



Cell-body ciliated : nutrition saprophytic : asexual repro- 

 duction by binary fission : sexual reproduction by conju- 

 gation of equal and similar gametes followed by multiple 

 fission of the protoplasm of the zygote, forming spores . 36 



4. Englena. 



Cell-body ciliated or encysted : cell-wall of cellulose : 

 mouth and gullet present : nutrition holophytic and 

 holozoic : reproduction by binary and multiple fission . . 44 



5. Protomyxa. 



Cell-body amoeboid, ciliated, or encysted : plasmodia 

 formed by concrescence of amcebulse : cell-wall nitro- 

 genous (?) : nutrition holozoic : reproduction by multiple 

 fission of encysted plasmodium 49 



