40 BOTANICAL GAZETTE (yuLy | 
a definite wall (or membrane) and is more or less hemispherical. The — 
cytoplasm is dense and very homogeneous, and in the center of each — 
cell is a large nucleus with no nucleoli. The entire absence of starch ~ 
in the male cells is noteworthy, as compared with other Cupressineae. 
In this preparation the two cells are just beginning to separate, and _ 
probably they would finally become rounded off as reported by Law- — 
SON (4) in Libocedrus. In contact with one of these cells (see figs. 36 — 
and 37) is a curious body which presents the appearance of a vesicle 
containing a number of small, deeply stained granules. No light . 
can be thrown on the morphology or functions of this body. No 4 
trace whatever can be seen of the two sterile cells. Possibly their — 
disappearance may be connected with the appearance of the vesicle, — 
but this is merely conjecture. | 
6. Fertilization and embryogeny 
The actual process of fertilization has not been seen in Widdring- 
tonia; probably it agrees essentially with that in other Cupressineae_ 
as has been found to be the case in Callitris. , 
The first stage of the proembryo shows two free nuclei arranged 
lengthwise in the archegonium (fig. 38). The two nuclei are alike 
in size and structure. No starch is noticeable in the proembryo at 
this stage, but in all later stages seen, a considerable amount of starch 
is present. In later stages the structure has often been very difficult: 
to interpret. Although a considerable number of preparations has 
been obtained, the sections have nearly always happened to be oblique. ; 
diameter of the drawing is to the diameter of the section, then a solid 
figure is obtained which represents accurately the object sectioned, 
parent gelatin. The gelatin plates can be easily stuck together by 
wetting them slightly. : 
Figs. 39 and 4o are reconstructed from serial sections. They 
show proembryos containing five and ten nuclei respectively. 19 
fig. 39 delicate walls can already be seen between the nuclei, the 
