532 



MARSILEACEifc. 



from the larger papilla exhibits, however, in the centre, a 

 cell containing granules, completely surrounded by grume, 

 and apparently quite isolated (PI. CXXVI. Fig. I. ,3d.) ; with 

 this exception and the difference in size, its contents may, I 

 think, be considered as identical with those of the others. 

 But this includes the curious difference of trifacial cells beins 

 developed both in the centre and the circumference. 



Following the development of each from this period sepa- 

 rately, it will be found that the grumous mass of the smaller 

 secondary capsules gradually becomes smaller, while the 

 number of the trifacial cells becomes visibly increased ; until 

 the whole or greater part of each secondary capsule is filled 

 with them and with grume (PI. CXXVI. Fig. JII.,4.) ; and 

 latterly by trifacial cells alone. After this however, the cavi- 

 ty of these secondary capsules become again filled with gru- 

 mous matter developed from the inner paries of each from 

 several points, each including a variable number of the adja- 

 cent trifacial cells (PI. CXXVII, Fig. III., 3, 3, 3.) These 

 at length meet in the centre and form a solid mass, imbedded 

 in which, without any appreciable order,* will be found all 

 the trifacial cells of the capsule (PI. CXXIV. Fig. IV., 8.) 



In the perfect state these secondary capsules are exceed- 

 ingly numerous, attached by capillary simple pedicels to 

 branches of a central receptacle (PI. CXXIV. Fig, IV., 3.) 

 They are of a brownish colour, the cells composing them are 

 in one layer, and are separable from each other (PI. CXXIV. 

 Fig. IV., 6.) Each contains a sub-globular whitish opaque 

 body, with an unequal surface presenting prominent and de- 

 pressed parts (PI. CXXIV. Fig. IV., 7.) It can scarcely be 

 considered as organically cellular, although its surface to a 

 greater or less extent appears cellular under the microscope, 

 for pressure destroys this appearance, and it then appears as 

 uniform grume in which are imbedded the trifacial cells. 

 These are of unequal size ; some of them can be seen with- 



* These lines are presumably unabsorbed or unaltered portions of the 

 original continuous grume. 



