AZOLLA. 



611 



adhesion with one, both were to pro-luce pedicellate bodies, both were 

 exactly similar, though one was a little larger than the other. Tlie 

 nucleus chiefly cellular grume and granules adhering to the walls of 

 the cells ; its centre opaque. 



The future pedicellate bodies, sessile or on one cell looked hollow 

 in the disc, which was -J- opaque with grume, the margin rim -like, 

 cells beginning to be marked out, looking as if the transparent 

 part were formed by expansion of a nucellus. 



Fig. IV. — a, Represents a young mass of capsules dissected out 

 from a body: the original nucleus appears unchanged: not even 

 diminished, (see above), but it cells are more distinct, and it is less 

 opaque, the developement is from above downwards ! ! 



All the future thecae, young and old. have a grumous disc, rendered 

 more evident by iodine ; this is largest and most opaque; and also the 

 most advanced. In the uppermost also, more transparent nuclei may 

 be traced, as if extending in size until they occupy the greater por- 

 tion of the cavity once opaque ; this looks then incrusted with grume; 

 see 1. 2. 3. which give the ratio of developement. 



What are the cellular bodies attached to the base of the foot 

 stalks of the advanced ones. 



According to developement, is the distinctness of the superficial 

 cells: these are traceable in 1, whereas in 4. the parietal or double 

 margins are distinct, 



a, i C. L. M. 



1, 2, 3, 4, T V M. 



Fig. V. — A pair of bodies of ovula of 1 iuvolucrum, in both the 

 remains of filaments are seen adhering to the apex, one only appa- 

 rently entering, in both the granular communication is distinct, 

 especially in the right, or more advanced one. 



In this the original nucleus is larger, broader at the base ; it ap- 

 pears especially along the sides to be cellular. There are only small 

 projections round its base; from the upper part hangs a yellow sac 

 by means of grumous matter, beginning to exhibit the frondose lo- 

 bation, vessels are seen very evidently, expanding round the base 

 of the nucleus. 



In the other, the yellow sac is more globular, but still presents a 

 short neck or mouth, between it and the apex of the nucleus, is a 



