ao 
vo 
LIFE HISTORIES OF THE PROTOZOA. 7 
the cyst as ‘‘swarm-spores” (zoospores, Fig. 128, Ca, by :¢). 
These zoospores then assume an ameeba-form. These unite by 
twos or threes, or more, and form a new individual as at D, where 
two ameeba-like germs unite themselves by their anastomosing 
pseudopods and draw themselves over a Diatom (a), m€ et in the 
middle, and unite into one individual moner. Fig. 128, E, repre- 
sents a fully grown P. aurantiaca after having had a liber: al diet 
of shelled Infusoria (E, a). From the centr: al sarcode body the 
very strong, branching, tree-like pseudopods radiate, their outer 
Fig. 128 
Development of Protomyxa. 
sent-shaped meshes. The vac- 
anastomoses forming numerous cresce 
uoles extend into the larger pseudopods ; 
Ameba stage after they begin to take food. 
This adult, Amceba-like form becomes ency sted in the m 
thus described by Heckel. ‘‘To complete the natural history of 
the Protomyxa, it still remained only to observe the encysting of 
the adult form, the transition from the free’ moving plasmodia 
to the stationary red balls which had attached themselves to the 
Spirula shells near the latter. I succeeded in establishing this 
also. Two of the largest of the best fed plasmodia, which con- 
they first appear in the 
anner 
