ei i NEPRENTTTTY WS S YT TS 
THUJA OCCIDENTALIS. 25 
round the sides of the excavation. Then umber of granules 
contaiued in the visible parts of the boyaux, that is, in those 
parts which are not imbedded in the tissue is evidently much 
deminished, many of the grains of pollen which have not 
generated boyaux are nearly empty. Can these have excited 
any action on them? "The Quintine is at this period tender, 
and is easily detached. It appears like a whitish ball of the 
size of a small pea. It is now distinctly cellular, the cells 
being exceedingly lax and of irregular figure, and hence 
does not collapse on the rupture of the cuticle, asit may now 
be termed. Mixed with the lax tissue are granular bodies, 
which perhaps may be the nuclei of the cells escaped on 
pressure, as they frequently occupy the axis of the cells. 
The bodies appear like sacs with irregular superficies, and 
contain many small granules. 
The cellules of this sac are formed from without inward. 
Those of the periphery being in a state of cohesion, while the 
centre of the sac is occupied by fluid. 
The outlines of the lately formed and distinct cells are 
exceedingly faint, even under a triplet 44. These contain 
.many granules which are in exceedingly active motion of a vi- 
bratory and rotatary nature, accompanied with very irregular 
and quick change of situation. These cells vary much in 
size, and in the larger which are of irregular outline, there is 
an evident, though faint tendency to subdivision. It isa 
most extraordinary fact, that these actually undergo slow 
changes of form, even when detached, and are still in the field 
of the microscope ! 
The indications of subdivision are merely owing to a 
greater aggregation of the globules. These bodies are parti- 
cularly active in the new sacs, in which they are most trans- 
parent. There is some similarity between the appearance 
of these and of germinating sporules of Marchantia. 
At this period, the sac is tense, and when pierced by a 
needle the contents are propelled to a considerable distauce, 
D 
