THE INFUSORIA 



423 



Vorticellids and Acinetaria. Amoebophrya, Koppen. (Fig. 90.) With 

 a circlet of tentacles and a spiral groove provided with cilia in the free 



Fio. 



1, Sphaerophrya magna, Maupas. x 800. It has seized with its suckers, and is in the-act 

 of sucking out the juices of six examples of Colpoda parvifrons. a, meganucleus ; b, contractile 

 vacuoles. 2, Sphaerophrya urostylae, Maupas. x 200. Normal adult, a, meganucleus ; 6, con- 

 tractile vacuoles. 3, the same dividing by transverse fission, the anterior moiety with temporarily 

 developed cilia. 4, 5, 6, Sphaerophrya stentorea, Maupas. x 200. Parasitic in Stentor, and at 

 one time mistaken for its young. 7, Trichophrya epistylides, Cl. and L. a, meganucleus ; 6, 

 contractile vacuoles. 



FIG. 90. 



Amoebophrya sticholonchae (at A) encysted in the protoplasm of the Acanthometrid 

 Sticholonche zanclea. C, central capsule of the Sticholonche. (After Borgert.) x 260. 



state. Without cilia or tentacles in the parasitic stage. Endoparasitic in 

 Acanthometra and Sticholonche. 



