522 



MARSILEACEJE 



Fig. III. — 1. Represents along section of the capsule of Salvi- 



nia verticellata 1 inch focus 45 times mag. 

 2a, 2b, 2c, 2d. Sporangia or secondary capsules 1-16, all about 



the same poriod of development : the outlines of the cells of 



2d., in the grumous nucleus very faint and scarcely to be relied 



on. 



2c. Represents a single instance, the usual form is angular or ir 

 regular, nucleus generally more or less isolated. 



3a. 36. Secondary capsules from the same body, but more to- 

 wards the periphery of these, 3a is the more developed ; they 

 are parent cells, because they are larger than the subsequently 

 trifacial ones ; in one of the parent cells ? an obscure marking 

 of division occurs, but not in the largest one, and only thought 

 to have been seen once. 



3. Next 2d no granular angular coagulations, but obvious gonfle- 

 ment of the granular mass, as if cells were forming. 



4. More advanced peripheral 1-16, in this the grume presents a 

 number of trifacial cells, imbedded in it. 



5. Some of these detached. Varying much in size, the upper 

 one being the medium. 



These appearances are clear enough, but the parent cells are not 

 clear : indeed, they have been so obscure, that arguing from the 

 ease with which they are found in higher Acotyledons generally. I 

 sometime supposed the trifacial cells to be the parents themselves, 

 which is not the case. 



Can the abortion of the other two cells account for their not pre- 

 senting the usual relations, even when imbedded in grume which 

 should hinder them from totally losing their original relations. 



What are the angular nuclei, which appear to be usual, here is a 

 marked allusion to the ovate body of Azolla as regards development. 

 Their aggretion is apparent, 2c. however was only observed once. 



Salvinu PI. CXXVII. (continued.) • 

 Fig. II. — I, 2, 3, Represent stages of yellow sacs of the same 

 common capsule, 3 being the middle focus of 2 which is super- 

 fice in focus, 1, 3, shew the mammilla and its apparently hav- 

 ing something to do with the celluiarity, which is not organic. 



4. Oblong reproductions 1 inch (45 times) opaque. 



5. One in water. 



