DIMOEPHA MUTANS. 



69 



central axis originating from tlie centrosome; con- 

 tractile vesicles two or more in number. 



Diameter of body 11/xto Ibfi?; flagella about one 

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



Habitat. — -Aquatic vegetation. 



Distribution. — England. — Bournemouth, Hants 

 (Chaffey). 



Schouteden found his specimens on the branches of 



Fig. 195. — Dimorpha, mittens. On the left, a speoimeu with pseudo- 

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

 form without pseudopodia. (After Blochmann.) c.v. Contractile 

 vesicles. 71.. Nucleus. 



the colonial Flagellate Anthophysa, and states that one 

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

 were observed to feed on Monas ; 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. 



