IN GOSSYPIUM. 163 
penetrate into the substance, and to a considerable depth ; it 
terminates in a rounded caecum. 
They were examined by three excellent triplets of = =; 
All those I examined, amounting to 5 or 6, appeared to be 
either entirely or very nearly deprived of granules. Of the 
precise nature of these tubes, doubts will remain until they 
have been actually traced to be continuous with the boy- 
aux. But I believe that they will be found to be torn at the 
summit of the projecting part. For my own part, I do not 
doubt that they are the boyaux. 
'The formation of the embryonary sac is somewhat indis- 
tinct; but I believe that it is membranous. It is filled inte- 
riorly with fluid and lax tissue, so that its parietes are with 
difficulty discernible. 
e embryo commences to appear before the boyaux 
have ceased to be, visible. 
The other points worth notice are the great development 
of the tegmen, contrary to Mirbel's idea, and its evident 
continuation as perhaps the principal membrane of the seed. 
The laterality of the embryo I have not been able to 
determine ; subsequently it is completely pushed to one side, 
and might almost be supposed to be external to the embryo- 
nary sac. [ts true situation will be seen from examination 
of the embryo at an early period. 
The antitropous ovule presents some curious reflections. 
The instance was a solitary one, can it be that inversion 
.was prevented by want of space? At any rate, it would 
seem that under certain circumstances, all forms of ovule 
may occur in one ovary. 
Fig. 2, and especially 2 b, prove that there is no separa- 
tion of coats at this period, and that consequently Mirbel's 
idea as to the origin of the coats is wrong. Pressure, I say, 
will always demonstrate separation when it does exist. 
At the time of expansion, and even after the partial appli- 
cation of the pollen to the stigmata, no tubes are to be dis- 
covered within the cavity of the ovary. The nucleus at this 
period has the usual conformation, but the cells at its apex are 
