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On the Morphology and Development of 
Phoma Richardiae n. sp. 
By 
W. B. MERCER, B. Sc. 
(Vans Dunlop Scholar, University of Edinburgh.) 
(Fortsetzung.) 
5. Germination of pycnospores. 
The most vigorous germination takes place on plum agar. Here the 
spore swells to three or four times its original size, pushing out most 
commonly two, but sometimes one or three germ tubes 3,5—4 jli in dia¬ 
meter (Fig. 3, i — 12 ). The germ tubes may be produced simultaneously 
(Fig. 3, 5 , 7 , 8) or successively; the third germ tube, when formed, often 
arises after the others have attained considerable size (Fig. 3, 12 ). During 
