CLASSIFICATION OF THE ANIMAL KINGDOM. 



CLASS II. RHIZOPODA. 1 



OEDER I. MONERA. 



Sub-ord. 1. G-ymnomonera. Protamceba (fig. 2), Myxodic- 



tyon. 

 Sub-ord. 2. Lepomonera. Protomyxa, Myxastrum. 



(Haeckel, Studien iiber Moneren und andere Protisten, 1870 ; Cienkowski, 

 Seitrage zur Kenntniss der Moneren, Archiv fur Mikros. Anat., 1865.) 



Fig. 2. Monera. Protamceba primitiva, enlarged, after Haeckel. A, An individual with 

 a single pseudopodium protruded ; B, Another individual dividing by fission into two por- 

 tions. 



ORDER II. AMCEBEA (Lobosa). 



Sub-ord. 1. Amcebina. Amoeba (fig. 3), Mastigamceba, 



Pdomyxa. 

 Sub-ord. 2. Arcellina. Arcella, Difflugia, Hyalosphenia, 



Quadrula. 



Hertwig and Lesser place the Arcellina along with Gromia and the 

 Foraminifera in a common division, to which they give the name of 

 Thalamophora. The Arcellina, however, differ from the Foraminifera, 

 and agree with the Amoeba in the blunt lobose character of the pseudo- 

 podia. 



(Leidy, Fresh-water Rhizopods of North America, 1879 ; Carter, Fresh- 

 water Bhizopods, Ann. and Mag. Nat. Hist., 1864 ; Hertwig and Lesser, 

 Ueber Rhizopoden und denselben nahe stehende Organismen, Archiv f. Mikr. 

 Anat, 1874 ; Frantz Eilhard Schultze, Rhizopoden-Studien, Archiv f. 

 Mikr. Anat, 1875.) 



1 The Sponges are here removed from the Rhizopoda, and are considered as 

 an independent class of the Protozoa. 



