66 Mr. Griffith on the Ovulum o/'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. 



Tab. 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 

 grumous process. This process I have stated before to arise from 

 an aggregation, or rather agglutination, of the originally distinct and 

 active 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 ovulum remains in situ ; part of the included portion 



