UENDEOSOMA RADIANS, EHRENBERG. 
161 
it must be remembered that in the case of Dendrocometes we 
described only the division of the micronuclei in conjugation. 
The mode of division of the micronuclei in gemmule-forma- 
tion in Dendrometes differs in some respects from that seen 
in conjugation. On this subject we hope to write a further 
paper at a later date. We have not yet been fortunate 
enough to observe any phase in the conjugation of Dendro- 
soma. 
It is possible that the minute granules of chromatin seen 
in various stages of the division of the micronucleus in 
Oendrosoma represent the chromosomes. With this view in 
mind we have carefully compared them in the earlier and 
later stages of the process to determine whether they are 
double in character before their separation in the two poles. 
In a recent paper Calkins and Cull (4) have shown that in 
the earlier maturation divisions of the micronuclei of Para- 
mecium aurelia the chromosomes divide longitudinally. 
W e can only state that we have not been able to find any 
evidence that the chromatin granules in these karyokinetic 
figures of Dendrosoma divide at all. Evidence of this, 
however, may be forthcoming from the stages we have 
missed. 
The Gemmula;. 
The gemmulm were first discovered by Levick, but it is 
difficult to understand from his figures v/hat is their exact 
shape. If his tig. 4 is drawn accurately to scale theg’emmula 
it represents was about 45 n in diameter. Kent describes the 
gemmula? as “ hypotrichously ciliated embryos of relatively 
large size.” Unfortunately he gives no statement of the size, 
but according to his figure they are about 36‘3 fx in diameter. 
Sand repeats KenPs statement that these bodies are hypo- 
trichous, but adds that they are “ en forme de lentille bicon- 
vexe aplatie,” and have three contractile vacuoles (in corre- 
spondence with Kent^s figure). 
In the living material we have examined from the Bridge- 
