CHLAMYDOMYXA MONTANA. 241 
most definite laminated structure, consisting of a series of 
“ shells ” or complete coatings of cellulose substance, deposited 
one within the other, on the surface of the protoplasmic 
organism. The protoplasmic organism apparently shrinks 
after the formation of a first cyst, and having grown smaller 
forms a second deposit, and so on, in some cases to a ninth or 
tenth. In the second place, (b) the living organism enclosed 
in the cyst appears to be by no means quiescent, but to be 
undergoing important chemical changes, as shown by its 
remarkable change of colour (to a bright green) and its de- 
velopment of “droplets” of red-coloured oily material. 
The activity of the encysted Chlamydomyxa is further 
and very markedly demonstrated by its movement, 
change of form, and division into separate masses. 
The fact that the shells or coatings of cellulose are so freely 
and abundantly deposited by the living matter enables one to 
follow these changes in the encysted Chlamydomyxa with 
certainty. Thus in Pl. 15, fig. 6, we have evidence of division 
of an original mass of living Chlamydomyxa into three; in 
fig. 7, part of the cyst at first formed and marked a has been 
deserted, whilst the original outer cysts are much larger than 
those now occupied by the living material, which has divided 
into two masses. In fig. 9, three cysts occupied by green- 
coloured Chlamydomyxa which have given rise also to the red- 
coloured oil drops, are represented. These three cysts pro- 
bably originated from the division of one parent mass. The 
division of the encysted Chlamydomyxa has been described in 
considerable detail by Professor Patrick Geddes in his paper 
already referred to. 
In reference to differences between C. montana and C. 
labyrinthuloides, I may point out that I have not seen the 
body or mass of C. montana when it is in the dendriform 
streaming condition, to be partly lodged in the ruptured cyst, 
as Mr. Archer saw and figured that of C. labyrinthuloides. 
Nor have I seen green pigment (presumably chlorophyll) and 
red oil drops in that phase, as Mr. Archer describes for C. 
labyrinthuloides. The dendriform streaming specimens of 
VOL. 39, PART 2.—NEW SER. Q 
