520 



If ARSILEACEJE. 



Fig. II — 1, 1, 1. From the same young capsule. Sphserical 



secondary capsules, the uppermost represents an abortive one, 



1-16, at least as regards the contents. 

 2. Apex of a fructiferous axis £ : this would have been a sphasrical 



body, bearing secondary capsules. ^. 

 3* Superficial view of a secondary sphserical capsule, the grume in 



which the trifacials are imbeded is more thick and opaque J. 



4. Central focus of the same. £. 



5. Contents of the same, the grume appears to have condensed 

 into a solid mass. 



Fig. III. — I was unable to dissect out the nucleus of this, which 

 apparently is reduced to great tenuity. The yellow sac was easily 

 dissected, separating in one instance with its gruaious cap. In the 

 other this was torn a\vay,and in this the yellow bag looked as though 

 contained in a very fine hyaline membrane. The grumous 

 cap contains more transparent places, in one of which is an 

 angular brown nucleus. 



The sac itself has a stout rim, under some aspects it is thick in 

 texture, almost waxy, not cellular and contains granules and many 

 oily ? globules. 



The pollen is unchanged in some : most of the granules however 

 have become more or less rounded, the edge of the green part is 

 now a dark line, the envelope remains ; iodine slightly fuses it. Io- 

 dine renders the yellow sac dark brown. 



How is it that similar fecundation should produce such dissimilar 

 results. ? 



The angular nucleus becomes the punctum ! the surrounding hya- 

 line part the frondose lobe. The sac freed is a perfect sphere. 



Salvinia verticillata, PI. CXXVI. (continued.) 



Fig. 1. a. Plant natural size. — 



1. Young capsule (this was a solitary one) 1 inch M. most o£|» 

 the hairs removed. 



2. Long section of the same. 



3. One of the bodies of this, they were 16 in number. 



3a. The same under ^ (M.) shews the peripheral cells, chiefly 

 towards apex or upper half at least, the large nucleus, and 

 the central cell. 



