422 



PROr. ALLMAN ON THE EECBNT EESEAECUKS 

 Fig. 12. 



Vampt/rella gomphmiemaiis. 



A, a colony of Gompkonema attacked by numerous VampyrellcB : a, an en- 

 cysted Vampyrella ; h, b, the cyst with its contents broken up into four tetra- 

 spores ; c, e, a tetraspore transformed into the Vampyrella, which is escaping 

 from the cyst, and has already begun to creep along a neighbouring branch ; 

 d^ d, tetraspores still included in the cyst ; /, a Vampyrella in the act of de- 

 vouring the contents of a Gomphonema-coll ; g, h, empty cells of the Gompho- 

 nema being cast out of the body of the Vampyrella. B, an isolated Vampyrella 

 moving about by means of its extended pseudopodia. (After HaeckeL) 



become divided into four similar parts (5, V). These are the tetra- 

 spores, which Cienkowski had already shown to constitute part 

 of the developmental cycle of Vampyrella. In one spot of the 

 capsule a small opening now appears, and through this the tetra- 

 spores slowly press themselves out (e), immediately emit pseudo- 

 podia, and assume the form of the creeping Actinophrys-Wke proto- 



