Dodge: The Genus Gym no-sporangium 



193 



from the same section but at about the center of the sorus. Between the two 

 parts shown there is a space equivalent to about five or six times the amount 

 shown in the figures. At a (Fig. 9) marginal growth is still continuing slowly. 

 The nuclei in the terminal cell at b appear to be degenerating. The sorus is 

 abnormally high at c-d due to an irregularity in the gall. Here the terminal 

 cells have been cut off and their cytoplasm is becoming more vacuolated ; e, 

 first buffer cell that has lost both cytoplasm and nuclei ; f, g, a depression in 

 the primordium due to a less vigorous growth of the hyphal mass below ; m, o, 

 q, r, other terminal cells in various stages of degeneration ; h, a basal cell just 

 beginning to bud ; p, conjugate division of the nuclei in young spore buds ; k, 

 nuclear division completed in a bud that pushes out laterally from the basal 

 cell on its lower side, and the septum, if formed, is not visible because the 

 bud bends down and is not within the terminal cell as it appears in the figure ; 

 i, n, q, r, two-nucleated buds cut off by septa from their basal cells ; s, four- 

 nucleated buds, nuclei of a two-nucleated bud dividing, two-celled spores, 

 nuclear fusions, etc. 



