Phyllophora Brodiæi and Actinococcus subcutaneus. 29 
sporangia and continue their life in the following season, 
whereas most nemathecia perish after the production of 
tetraspores, 
When the nemathecial bodies have attained a certain 
degree of development they show a differentiation in an 
inner medullary tissue composed of roundish cells and an 
outer portion built up of radiating filaments consisting of 
Fig. 14. Phyllophora Brodiwi. A, specimen from Middelfart, April; radial 
section of young nemathccium, showing the outer sterile cells and the 
fertile ones, the latter connected by primary pits and partly by secon- 
dary pits with cells of the contiguous filaments. B, fertile filaments from 
specimen gathered in Store Belt, November 24th, with sporangia in 
division. 625: 1. 
rather low cells connected by pits in the transversal walls 
(fig. 14). The 3 or 4 outermost cells in the cell-rows are 
longer and narrower and remain sterile, while the other cells 
develop into tetrasporangia (comp. DARBISHIRE 1895, p. 24). 
As the sterile outermost cells are early differentiated and 
seem not to remain meristematic, and as the number of the 
fertile cells increases considerably during the development 
