DIMOKPHA MUTANS. 



69 



central axis originating from the centrosome; con- 

 tractile vesicles two or more in number. 



Diameter of body 11 /x, to 15/x ? ; flagella about one 

 and a half times the diameter of the body in length. 



Habitat. Aquatic vegetation. 



Distribution. - - ENGLAND. - Bournemouth, Hants 

 (Ghaffey). 



Schouteden found his specimens on the branches of 



FIG. 195. Dimorpha mutans. On the left, a specimen with pseudo- 

 podia extended. (After Schouteden.) On the right, an immature 

 form without pseiidopodia. (After Blochmaun.) c.v. Contractile 

 vesicles, n. Nucleus. 



the colonial Flagellate Antlioplu/sa, and states that one 

 of the flagella may be used as an anchor ; the animals 

 were observed to feed on Montis ; the contractile vesicles 

 had a period of 25 seconds. 



Gruber gives illustrations showing the Heliozoan 

 state in which the body is spherical and the pseudo- 

 podia in various states of development, also of imma- 

 ture forms, both spherical and ovoid, in which the 

 pseudopodia were absent, but in all one or both of the 

 flagella are present. 



The flagella of the individuals found near Bourne- 

 mouth were in constant and rapid vibration. 



