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200 APODACHLYA, A GENUS OF FUNGI NEW TO BRITAIN, 
at the top, and the idiadanie are extruded as a cluster of some dozen 
encysted spore-bodies, which remain for a time attached to the top 
of the empty sporangium. Then one by one the zoospores squeeze 
their way out of the cysts and escape. The zoosporangia vary much 
in size, but roughly are about 0°05 by 0:02 mm. They are produced 
abundantly; but as the crown of extruded eh: -bodies is readily 
detached from the empty sporangium, it is well to harden the 
specimen with osmic acid before teasing it oe > Ancenie may be 
sought for on rotting Characee, as well as in the haunts of Apodya 
passing on to Achlya, it is worth while to call to mind the 
difference between the zoosporangial formation in this genus yee in 
Saprolegnia. In the latter the zoosporangium is apical, and e 
new sporangium grows up inside the empty tube of the other one. 
the preceding sporangium ; and thus the axis of the hypha becomes 
sympodial. In Achilya also the extruded zoospores are retained for 
a time encysted in a cluster attached to the top of the empty 
spora e much mo 
rather angulate outline, owing to the presence of a few low promi 
nences of the oogonial wall. The oospores are but two, and the 
antheridia solitary. Finally, our specimens of Achlya spinosa are 
distinctly interesting as being somewhat of a link between De Bary’s 
types of A. spinosa and A. stellata. The oogonia measure 0°06 mm. 
in extreme diameter, and appr roach those “of the latter species in 
sharper, and more promi eover, oogonia are 
provided with an antheridium springing from the stalk-cell, and in 
this way they are referab spin t ia of our 
plant are always terminal on the main filament, or more often on 
short branchlets, and are never intercalated in the filament, as in 
the type of A. spinosa or in A. cornuta Archer, nor do they bear ™ 
strong terminal spine so characteristic of these two species—or rathe 
synonyms—for it is doubtful whether these plants can be eae 
es oa: species. They require further investigation, as also does 
stel 
It would be well worth the while of mesene to give a little 
time to the study of our native Saprolegniacee. How to do this for 
8 
put in pots of pure water; and froshly-killed flies should then be 
added. In three or four days the flies will almost inevitably be 
