32 CHANGES SUCCEEDING IMPREGNATION. CHAP. VIII. 



lobes had not yet separated at the top ; but the 

 umbilicus was less distinct. 



On the 10th, the umbilicus was considerably 

 shrunk, and the plantlet now separable from the 

 cotyledons, measuring about -^of an inch in length. 

 The amnlos occupied about half the cavity of the 

 nucleus. 



On the loth the chorion was much shrunk and 

 the cotyledons proportion ably enlarged. They were 

 now pouch-shaped, circular, but individually plano- 

 convex with the flat sides laid close together. 



On the 20th, the fruit had begun to assume a 

 reddish hue, the embryo measured about T V of an inch 

 in length ; the amnlos being now much firmer than 

 before, and the chorion almost entirely absorbed. 



On the 26th, the fruit was ripe ; and the embryo, 

 having exhausted the whole of the chorion and 

 amnios, was now complete, occupying the whole 

 extent of the cavity of its envelopes. 



SUBSECTION n. 



The Pea. On the 4th of June, 1808, when the 

 legume of a flower fully expanded was opened, and 

 the nucleus of a seed cut asunder, it was found to 

 consist merely of a homogeneous mass of pulp, 

 measuring about ^ of an inch in diameter. 



On the 8th, when a legume was opened of which 

 the petals had just fallen, a small speck was ap- 

 parent on the longitudinal section of the nucleus^ 



