Mr. Gnirrrrn on the Ovulum of Santalum album. 63 
depression. As the development proceeds, the cellular body, which has un- 
dergone scarcely any change in shape, enlarges and becomes firmer; at its 
apex a cavity will be seen, which is partially occupied by an oblong, minute, 
cellular, grumous body, the rudiment of the future embryo. This is attached 
by its superior margin to the corresponding part of the apex of the cavity, 
which is formed by excavation: as it continues to enlarge it extends down- 
wards, and its attachment becomes considerably narrower and very slight, 
and at a rather later period it appears completely detached. As the cellular 
body continues to enlarge, it becomes whiter and of a firmer texture, and the 
embryo becomes oblong and cellular, the tissue towards its apex is more 
grumous and dense, and immediately above this part there is a degree of con- 
striction visible. As the fruit advances towards maturity, the endocarp, which 
has already assumed the appearance of albumen, diminishes, and thé meso- 
carp begins to be indurated. "The cellular body is now nearly globular, white, 
and of a dense texture; its component cells being loaded with granules of 
fecula. The apex of the embryo now becomes lobed, indicating the com- 
mencement of a cotyledonary division ; its attachment is exceedingly fine, and 
it is itself evascular. The subsequent changes in the fruit consist in a still 
further diminution of the endocarp, which is subsequently reduced to a spongy 
lax coating, adhering both, to the now osseous mesocarp and to the albumen. 
The sarcocarp terminates by becoming baccate. In the seed they consist of 
an enlargement of the albumen (originally the cellular body); its apiculus 
finally almost totally disappearing. The division of the cotyledons increases, 
and has reached to a considerable extent before the tissue of the radicle 
becomes, as it were, condensed. The cotyledons are, during the mS part of 
their development, somewhat conduplicate; they terminate by 8 
gated and plane on their internal appressed faces. The perfect radicle is 
ovate, tapering to a fine point. 
From this statement it will at once appear that the mode of de 
of the ovula of Santalum is different from that which usually obtains. The 
cellular oblong bodies which are attached to the placenta are P ad E 
ovula, and have the appearance and cellular structure of the nuclei of or 5 
nary ovula. The membranous tube from its anatomy die: saints, ” "e 
sac of the an nios, which in ordinary structures lines the cavity formed in the 
