1 6 REPRODUCTION OF AMCEB&. PART in. 



and vacuoles excavated in the substance of the body. 

 It is the first obscure rudiment of a circulating system. 



In all the Amoebae the semi-fluid sarcode, with the 

 numerous bodies suspended in it, rotates at a varied 

 rate within the pellucid coat ; a motion presumed to be 

 for respiration, that is to exchange carbonic acid gas 

 for oxygen, so indispensable for animal life. 4 



Although like other animals, the Amoeba cannot 

 change inorganic into organic matter, as the vegetable 

 ( Amoeba can do, these two Protozoa are similar in one 

 mode of reproduction ; for portions of the animal Amoeba 

 or even one of the pseudopodia separate from the gela- 

 tinous mass, move to a little distance on the surface 

 of the water, and become independent Amoebae. 



With a high microscopic power, many bodies besides 

 the digesting vacuoles and pulsating vesicles may be 

 seen imbedded in the sarcode of the Amoeba princeps ; 

 namely, coloured molecules, granules, fat-globules, and 

 nuclei. All these bodies were seen by Mr. Carter, 

 in certain Amcebina he found at Bombay, together with 

 v what he believed to be female reproductive cells, and 

 I motile particles similar to spermatozoids, or male fer- 

 tilizing particles. 



The Actinophrys, a genus of the order Eadiolaria, 

 differs from the Amoeba princeps in having a definite 

 nearly spherical form with slender root-like filamental 

 pseudopodia radiating from its surface in all directions 

 as from a centre. They taper from the base to the apex, 

 and sometimes end in knobs like a pin's head, but vary 

 much in length and number, and can be extended and 

 retracted till they are out of sight. They are exter- 

 nally of a firmer substance than the sarcode of the 

 body, which is merely a viscid fluid inclosed in a pel- 

 lucid film. The Actinophrys sol, which is the type of 



4 ' On the Amoeba princeps and its reproductive cells,' by Mr J. H. Carter: 

 Annals of Natural History, July 1863. 



