THE SPOROZOA 



177 



Amoebosporidia. Recent observations have shown, however, that these 

 processes are not pseudopodia, but are stiff outgrowths of the body, clothed 



FIG. 19. 



Doliocystis aphroditae 

 (Lank.) (par. Aphrodite 

 aculeatd), a non - septate 

 Oregarine with a distinct 

 epimerite. (After Lan- 

 kester.) 



Fio. 20. 



Associations of Gonospora sparsa, Leger, from the gut 

 of Glycera. (From Wasielewski, after Leger.) 



by cuticle (Fig. 21), so that the name Amoebosporidia rests upon a mis- 

 conception and must be abolished. The genus Pterospora is also remarkable 

 for the possession of retractile processes, resembling tentacles (Fig. 37). 



A curious feature of 

 Gregarines, and one which 

 has a marked influence 

 in many cases on their 

 external form and appear- 

 ance, is their tendency to 

 form associations during 

 the trophic period, a 

 peculiarity from which 

 the type-genus Gregarina 

 probably derives its name. 

 In Monocystis it has been ji. 

 seen that two individuals 



come together when full- FIO. 21. 



grown and become associ- ? ort . ion f ec JJ n of a Maipighian tubule 



magica infested by Ophryocystis schneideri, showing three 



ated to form a Cyst in individuals of the latter species (G), one of them with 



T ^4.1. o, n two nu clei, attached by stiff processes (the pseudopodia 



Common. In Other Greg- O f Schneider) to the wall of the tubule. p t syncytial 



arnes association may 

 take place at a much 

 earlier stage in the development of the individual (Fig. 20). 



12 



