Mr. Griffith on the Ovuliim q/'Santalum album. 69 



the style to the apex of the cell. The placenta is pushed com- 

 pletely to one side, and from the enlargement downwards of the cel- 

 lular body, their bases do not correspond, as in fig. 13. A cavity 

 is apparent at the apex of the cellular body. 



Fig. 15. Represents its longitudinal section. 



Fig. 16. Embryo in a very young state from the same ; it is somewhat dilated, 

 and more dense at its inferior free extremity. 



Fig. 17- Ovulum and placenta of a fruit 3^ lines long, showing the situation 

 of the placenta. 



Fig. 18. Barren (or rather abortive) ovulum from the placenta of the same; 

 very few globules or molecules are visible, and they are either sta- 

 tionary or sluggish. 



With this exception it agrees with the abortive ovula examined in 

 earlier stages. 



Fig. 19. Represents a long section of the cellular body at a period later than 

 that of fig. 15. The embryo is seen in situ. 



Fig. 20. The same embryo detached. The apex of the cellular body remains, 

 and to this the embryo is seen to be attached. There is an evident 

 commencement of the cotyledonary division visible at its lower ex- 

 tremity. 



Fig. 21. Embryo from an ovarium 4 lines long. The fruit is now nearly at its 

 full development ; the mesocarp is indurated, and the endocarp is 

 reduced to a spongy coating, which adheres to the indurated, nearly 

 osseous mesocarp, and likewise to the "albumen." This body now 

 occupies the entire cavity of the fruit, and has assumed its mature 

 form ; it is white and fleshy, and abounds with fecula. The embryo 

 is about 2 lines long, it is included in the "albumen," but is not 

 exactly axile. T'he apex or radicle is ovate and attenuate, and points 

 to the upper portion of the " albumen," and towards the apex of the 

 placenta, which is still visible, lodged in a depression on its surface. 

 The cotyledons are plano-convex, mutually applied by their plane 

 faces. The plumula is inconspicuous. 



I trust that the accompanying sketches will be found sufl5cient. 



