66 Mr. Gmrrirn on the Ovulum of Santalum album. 
tion between the apex and the exserted part of the tubular mem- 
brane. 
Fig. 6. Ovulum about the same period, highly magnified, and cut through 
longitudinally. The included part of the tubular membrane and its 
origin in a cul de sac are traceable. The exserted part is slightly 
swollen. The molecules were beginning to become aggregated in 
this part and in the apex. They were all highly mobile, especially 
those in the narrow portion of the membrane. 
Tas. II. 
Fig.7. Ovulum from the placenta of an ovarium just after the fall of the 
perianth. In this the filaments are seen attached to the extreme 
apices, and are apparently intimately confounded with the struc- 
ture of the membranes. Within the dilated apex a very distinct 
vesicle or sac is visible, attached apparently by its superior mar- 
gin, and containing a few mobile molecules. The appearance of 
molecules in this vesicle may, and probably does result from the 
presence of some between the vesicle and upper surface of the tube. 
Extending downwards from its inferior margin, there is a grumous 
irregular process, which reaches to the dilated exserted portion. It 
is broken in several places, probably from pressure. Near its apex 
and adjoining the vesicle globular bodies are seen adhering, of the 
nature of which I am entirely ignorant. Within the dilated exserted 
portion, and which is nearly transparent (with the exception of one 
part), the outlines of an internal sac are visible, which appears to 
taper superiorly towards the point where it is in contact with the 
Srumous process. This process I have stated before to arise from 
au aggregation, or rather agglutination, of the originally distinct and 
— molecules. Within this fine cellular outline, and in juxta- 
position with the apex of the ovulum, there is a cellular grumous 
body of a nearly globular form. The included portion of the tubu- 
lar membrane is traceable. | | 
Fig. 8. The fecundated ovulum from a 
; placenta of an ovarium two lines long. 
The apex of the ovalum remaj 
ns in situ; part of the included portion 
