214 Mr. Griffith on the Ovulum o/Santalum, 8$c. 



submammillate base, from which the sac always seems to arise, e. Embryonary 



sac. 

 Fig, 6. Embryonary sac before fecundation from ovary before expansion of perianthium, 



surrounded at its attenuate base by nucellar cellular tissue, from one of the cells 



of which it may be supposed to have originated. 

 Fig. 7. Embryonary sac, some time after the fall of the perianthium, with considerable de- 

 velopment in the cellularity of the sac, each of the cells of which are very large, 

 and each for the most part occupied by single grumous masses. At a, the perfo- 

 ration of the sac by the filament b, and the continuity of this with the vesicle c, 

 are shown. Two rather large grumous masses occupy partly the apex of the sac. 

 3. Embryonary sac, a good deal more advanced. The upper part (except the apex 

 itself) is now subdivided into a good many cells, almost all of which present a 

 nucleus, all being crowded with grume and containing some granules, particularly 

 those ,n which the nuclei are not evident. The formation of the cells is extend- 

 ing downwards, the base of the sac alone presenting its original membranous 



hyaline appearance. At a, the perforation of the sac is seen, the continuity of 

 the vesic le ft ( whlch has undergone no change) w . th the fikment d ^^ ^ 



observed. The peculiar manner by which the uppermost series of cells of the 



z :zz~^ extending ' as * were ' ° ver the iow - «* <* ** * * 



* ^ ^I'bS^r m0re aCWed ' ^ ^ ^ ° f ** -d. The 



H£2? ^ P y COntinU ° US WUh ^ £"*« fil -nt, now contains 



F%. 10. Seed from a young fruit 1| line long. The anex of th. ! i i u 



now nearly concealed lJU \ P ° ngmal embr yonary sac is 



situaJof the Swe ^ ^ ^ **" ***« * ***** tte 



Kg- 11. Longitudinal section of a more advanced fruit Th P i « ■ 



extend around the central H«« , • V1SC ° US tlSSUe does not 7 et 



oblique. tlSSUG aDd ltS h °™ - laments. The embryo is now 



