: 
; 
j 
1894.] Myxomycetes of Central. New York. 93 
it is now called, the swarm-cell, becomes spherical, and under- 
goes a short period of rest (plate x, fig. 10). The swarm- 
cells at this time measure about 9u in diameter. This diame- 
ter is found to be, on an average, about one and one-half 
times that of the original spore. 
After remaining in the spherical resting state for a short 
but variable time, the swarm-cell assumes a new form. The 
body elongates, becoming cylindrical or fusiform, measuring 
about 124x 2-34. At one end a cilium is produced which is 
long and lash-like, three to five times as long as the long 
diameter of the cell body. Often two cilia are produced, — 
one at each end (plate x, fig. 12). This biciliate condition 
seems to be peculiar to Enteridium Rozeanum, so far asI have 
been able to ascertain. De Bary mentions the fact that two 
cilia are occasionally produced, but his figures represent both 
cilia at the same end. 
By the lashing of the cilium the swarm-cell is made to 
move rapidly through the water, executing what De Bary calls 
the “hopping movement.” I cannot see the appropriateness 
of this term. It appeals to me more as an oscillatory or un- 
dulatory motion. Through the rapid lashing of the cilium, 
the body oscillates as if hung on a pivot at the center. The 
cell meanwhile is in constant amoeboid movement, so that 
Pid form is constantly changing, to a limited extent. The 
one the body does not change as a result of the motion of 
cell ORY but by virtue of some force within the body of the 
ber : : The vibration seems to be in a horizontal plane, 
rat “8 the double conical or figure-of-eight movement pos- 
sed by many bacteria. In the case of the biciliate swarm- 
the cil sneral shape of the uniciliate swarm-cell is fusiform, 
every naa being at the smaller, pointed end. In almost 
anum stance, the uniciliate swarm-cells of Enteridium Roze- 
(plate A a 4 curious appendage at the larger, posterior end 
toplasm, §- 11). This consists of a spherical mass of pro- 
of the ana a diameter slightly less than the short diameter 
joined t ody. is appendage contains a vacuole, and is 
° the cell body by a short thread of protoplasm. In 
