78 
whatever to the peculiar branches described before. In only one 
case did I notice any connection between these tubes and the oc- 
cupation and departure of the monads. That is to say, the extrane- 
ous branches often contained a few smaller spherical bodies, but — 
they seemed to originate and remain mostly in the original cells 
of the filament. Only in one case was their escape seen and 
this happened at about 11 A. M. A cell from which just the 
beginning of a tube projected, contained about four or five of 
these bodies, together with some slight remains of chlorophyll 
bands. Two of these worked their way slowly up to the pro- 
jecting tube and passed into it and then out of the cell. The 
opening in the wall was apparently caused by the action of some 
secretion from the green monad as it disintegrated almost mo- 
mentarily while I was watching it. The debris remained some 
time after both had escaped. The monads assumed the pear shape 
common to all such bodies when escaping through an orifice. 
Shortly after they were free they assumed a spherical form and 
were soon lost among the countless numbers of similar bodies. 
This was the only instance in which the escape was noted, be- 
cause, as stated before, the exodus appeared to take place in the 
night. Every morning hordes of these green monads were found 
floating about among the broken cells. For several days after 
their exit from the cells they remained in about the same condi- 
tion as at first. Then a change appeared ; on examining the 
material in the morning certain ones had become very much el 
larged, measuring at least twice as much in diameter as the others. 
These larger ones then went through a series of amoeboid motions 
lasting several hours, but terminating in no special change which 
was lasting. As this seemed a regular habit of the enlarged one 
several were watched closely through all the changing forms, 
and sketches made. The gyrations of one were followed through 
a period of about three hours and about forty sketches made. 
Others were noticed and a striking uniformity of change in shape 
appeared. To show this more clearly I requested one of my 
students to watch and sketch the evolutions of one, and the 
sketches were almost identical with my own. This peculiar 
series of motions never resulted in actual division, though appe?”” 
ing often as though this was the end in view, The whole retuf 
