CHLAMYDOMYXA MONTANA. 141 
ments, and probably as a result of them, numerous 
vacuoles (non-contractile) appear in the substance of 
the ectoplasm about the bases of the pseudopodia. 
During the activity of the animal there is a constant. 
movement of minute fusiform colourless bodies (similar 
to, but smaller than those observed in C. labyrinthu- 
loides), up and down the finely-attenuated threads, 
the precise function of which (as in OC. labyrinthuloides) 
has not been satisfactorily determined. Prof. Lankester 
Fie. 29.—Chlamydomyza montana. An individual extended and active. 
Chelford ; September, 1905. x about 400. 
was of opinion that they might consist of nuclear 
substance, “the particles of a fragmented scattered 
nucleus,’ but more recent researches by Dr. Penard 
have resulted in the discovery of true nuclei (which are 
numerous) in the pigmented substance of the endo- 
plasm. They are spherical, very pale, and_average 
2-75 w in diameter. Spherical cists are formed, several 
of which may be enclosed in a common cellulose 
envelope. A fragmentation of the plasma takes place, 
and there is a formation of secondary cists; these are 
liberated in due time, and undergo separate develop- 
