40 MORPHOLOGY OF PROTOZOA 



series of small spines. After growth of the gregarine is complete, the 

 epimerite is detached (Figs. 481 and 485). 



Many Mastigophora are able to attach themselves temporarily to 

 objects. This is generally effected by a flagellum, as in species of Bodo 

 (Fig. 21), but some forms, like Oiko- 

 monas, can become fixed by a pseudo- 

 podium-like process developed from the 

 posterior end of the body. In the case 

 of trypanosomes and their allies attach- 

 ment to cells is an important feature of 

 development in the invertebrate host. 

 In the intestine, proboscis, or salivary 

 gland of insects in which development 

 is taking place, large numbers of the 

 flagellates may be attached to the sur- 

 face of the cells, and as longitudinal 

 division may take place while they are 



Fig. 21. — Bodo saltans: A number of In- 

 dividuals ATTACHED TO A MaSS OF 



Debris by the Trailing Flagella 

 (x 1,000). (Original.) 



Fig. 22. — Stentor cceruleus ( x 146). 

 (Original Drawing from Life 

 by b. jobling.) 



attached, the surface of the cells may become completely covered with 

 attached organisms. In this process, what usually happens is that the 

 flagellum disappears, attachment being effected by the tip of the axoneme 

 (Fig. 150). 



In some Protozoa there is a sucker-like development of the surface 



