250 STR JOHN LUBBOCK ON THE 
The ovary has not materially altered, and the ovule is still 
very small. 
x8. Va, Va, vascular tissue; Co', Co’, masses of solid tissue ; 
Co, Co, cavities. 
A few days later, however, it has grown considerably and 
nearly fills the cavities. Fig. 5 shows a longitudinal section 
Fig. 5. 
P 
NM 
En 
Longitudinal section of more advanced fruit. Sept. 1. »x3.—7, testa; En, 
endosperm ; Em, embryo; P, perianth; Va, vascular tissue; Co, small 
eavity not yet filled by the seed. 
taken on the 1st September. Tis the testa, showing that the 
seed has now assumed its four-lobed form, though it has not yet 
quite filled the cavities in the fruit. The greater part, however, 
is ocenpied by endosperm, the embryo (Em) being still compara- 
tively small. 
Fig. 6 represents a transverse section near the base of the 
fruit, taken on the 21st September, when the fruit and embryo 
had attained nearly their full size, but had not yet reached 
maturity. Neither the placenta nor the original and true cavity 
