216 : DEVELOPMENT OF THE OVULUM 
ARTABOTRYS,—PLATE LVII. A. 
Ovule of Artabotrys adoratissimus, Anonacee, Demonstrating 
the origin of the plates which divide the albumen. 
1. Ovule. 
2. Ditto long section ; through its greatest diameter. 
3. Nucleus detached ; a portion of the secundine adher- 
ing to it. 
_4, Transverse section of ovulum ; a. primine ; 4. secun- 
ine; c. nucleus. Two vascular cords are seen 
on this section; at e. d. tissue containing air 
surrounding the two processes in the centre of 
which the vascular bundles run; f. cavity of the 
nucleus. 
5. Portion of transverse section ; a. testa or primine; b. 
secundine separated ; c. nüolöäis 
6. Transverse section of ovule more advanced ; a. testa ; 
b. secundine ; 5. a. commencement of its ‘proloniga 
tions; c. nucleus. 
More advanced ovule, section made along its least 
diameter ; a. testa ; f. secundine, each prolongation 
shewn to be doubie; c. nucleus 
8. Long partial section e less advanced ovule along its 
greater diameter; a. testa; b. secundine; c. exos- ` 
tome; d. nucleus; e. raphe. 
In this ovulum the primine and secundine always cohere ; 
at least in their earliest stages ; the 2nd raphe does not reach 
to the base of the secundine, 
ALLANTODIA,—PLATE LVII C. 
1. No vessels are to be distinguished. Sections of fertile 
pinne. 
