524 



M ARSI LEACE/E 



In this the original radiating lines are not destroyed : the yellow 

 sac presents an obscure grumous coating, it has more evident rela- 

 tions above with grume than elsewhere. A few of the abortive 

 sporules remain, two above in apical grume, one to the left, the yel- 

 low sac surface is not sphaerical above, but seems flatish : it also has 

 some relation or another with the grumous mass, and opposite it 

 present a mammilla projecting inside, which appears to pass off into 

 a thin lining, whether complete or not, not ascertained. 



Yellow sac detached, it is elastic to a certain extent, viewed cen- 

 trally presents undulated inner edge perhaps from oily globules ? ? 

 rim then also thick, trifacial line small but distinct, appearing 

 as if the thick yellow coat was there interrupted or at any rate, 

 thinner and whiter. Membrane thick tough waxy, contents though 

 turged, not ascertainable by the naked eye. 



Fig. III. — Rather more advanced, abortive sporules seen in both. 

 In the larger one, a conspicuous grumous envelope of irregular thick- 

 ness round it, and no rim, possibly the developement of the incrus- 

 tation. 



The left hand figure is the more usual, traces of the radiating 

 lines visible. 



Fig. IV. —Represents unequal development subcentripetal of ob- 

 long, or yellow sac bodies. 



1. One of the less developed M., the central is abortive, looks 

 like an angular granular nucleus, like those of the same organ 

 in Azolla. 



3. Represents parent cells from the grume surrounding the central 

 cell or its abortion, the outlines of the young spores very 

 faint, rather cognisable from different light than by its defined 

 membrane ; in one case more distinct, as also was the cell of the 

 parent itself seen. 



2. Monstrosity of one of the more developed, an irregular grume 

 adhering to the apex of the upper sac, both sacs surrounded 

 with proper grumous envelopes I have seen the same deve- 

 lopement of more than one large central sac at an early 

 period. 



4. Another less developed than 1, shews the trifacial central 

 cell clearly, (no other cell or nucleus near it.) 



5. A larger body of the same, the grume appears to originate 

 from the unaltered part. 



