210 Mr. Griffith on the Ovulum ofSantalum, 



Fig. 8. Placenta, with two fertilized ovula, one a good deal less advanced than the other. 



The course of the posterior extensions is traced out. 

 Fig. 9. Whole of the embryonary sac above the bulb. The cellularity of the vesicle is com- 

 mencing by the usual nucleary aggregation, and its lower part appears as if cut off 

 from the upper. This is, I think, the usual appearance. The pollen tube is still 

 seen in adhesion. 

 Fig. 10. Apex of an ovulum, or young seed, more advanced, a. Vesicle, b. Lax embryonic 



tissue, c. Condensed apex of ditto. 

 Fig. 11. Embryo of the same detached. The upper portion of the vesicle is undivided ; this 



is almost always the case. The letters have the same references as in fig. 10. 

 Fig. 12. Longitudinal section of young fruit. 



Fig. 13. The entire embryonary sac, of this period, dissected from its surrounding tissues, 

 with the exception of the apex of the nucleus. 



Tab. XVIII. 

 Osyris Nepalensis. 

 Fig. 1. A longitudinal section of the flower, before expansion, a. The part which may be 

 supposed to be derived from the adhering integuments of the flower, b. The part 

 which I suppose to correspond to the ovarium, c. The placenta, d, d. Two ovula. 

 e. The stigmata. 



Fig. 2. The placenta of the same, detached. The ovulum to the right i 8 somewhat dis- 

 placed. 



Fig. 3. Ovulum during the expansion of the Howe, a. Nucleus. A. Protruded mammilla 



ZtlZ::i - M ^^™»"^ U docs not appear to he pro- 



Fig. 4. P'-nta after impregnation, hut before any considerable sphacelation of stigmata. 



I l™ e d!d ;r accidenta% ruptured ; the ° ther » — - ~ **» 



he protruded apex of the embryonary sac. The dotted line a, a, a, a, is intended 



t:*::i cmtse of the emhryo ^ - for - ^ £2 * ■>-< 



end of embryonary sac. ' Ap ™ ° f nU ° leUS - b - P ™*™°^ 



K* l Placenta about the period of the fall of the periauthium, detached 

 I «. 7. Ovulum from the same. a. Nucleus b f'.ll, l ' amched - 



the sac ; to it a short filamen 1 1 ^Z"^ ° D "" — ed «P» ° f 

 bodies of considerable si.e. , ^^^----^.n--. 



