26 BRITISH FRESHWATER RHIZOPODA. 
adhering, are of frequent occurrence. Where the tests 
are sufficiently transparent, a streaming of the proto- 
plasm may be observed from one shell into the other 
(ve. y. Huglypha, Cyphoderia), slow but continuous, until 
one shell is entirely emptied. The pair will remain 
attached for a considerable time, and it is presumed 
that after separation the encistment of the united 
protoplasm, in the test which contains it, is completed, 
there to undergo subsequent division and to produce 
“ swarmi-spores. ” 
Vampyrella is said to reproduce while encisted, by 
dividing into a number of parts, each of which emerges 
provided with pseudopodia like those of the parent. It 
has been observed, however, in the case of V. lateritia, 
that young amceboid forms escape from the parent and 
pursue a separate existence, first as amcebule. These 
are liable to be mistaken, without careful scrutiny, for 
actual Amebe. At the time of, and immediately 
subsequent to, extrusion, they have sharply-pointed 
pseudopodia ; but after a while the pseudopodia become 
blunt, completing the resemblance to some of the 
smaller forms of Ameba joteus and even of Dactilo- 
spherium vadiosum. Their after-development has not 
been traced with certainty, but it is assumed, no doubt 
with good reason, that in a short time these off-shoots, 
or plasma-spores, of the Vampyrella develop into 
mature individuals. They are destitute of any flagellum. 
In Pelomyea, again, spore-formation, divergent in 
form, but probably not in substance, from the general 
type, has been noted. This organism is multi-nucleated, 
the nuclei being small and distributed throughout the 
plasma-body. An individual was observed by Greeff to 
liberate a number of amcebulee, which he thought might 
be its spore-like young. The animal at first seemed as 
if in the act of breaking up. Around the whole outer 
margin of the Pelomyra there came forth an incalcul- 
able number of minute amoebule, surrounding the 
parent body in a thick annularly-arranged crowd. 
These had all the same habits, movements, and size ; 
