2 1 8 British Fitn^i, 



i> 



described species. The plant producing zoosporangia 

 was not found in organic connection witli the sexual 

 form, the relationship between the two being assumed 

 entirely on tlie constant occurrence of the two forms. 

 I have seen a specimen bearing forty-five zoosporangia 

 arranged on a main stem as shown in fig. 47, and in 

 addition also were several sliorter lateral branclies. 



Saprolegnia I'lLilomnlves^V^. 't^ra. Mycelium stout, 

 7-10 yu, diameter, with numerous transverse septa, the 

 branches often connected bv short transverse branches 

 and forming H-shaped structures, sometimes more or 

 less flexuous ; zoosporangia numerous, intercalary, or 

 more frequently terminating short branches, globose, 

 50-70 fji diameter, containing zoospores, which often 

 germinate i// -S'/fH / antlieridia elliptic oblong; the 

 mycelium in addition bears many small abortive 

 sporangia or conidia on short lateral branches, 

 normally colourless, but often becoming rose-coloured 

 from absorbing tbe red colour of the host. 



Sajjrolegnia philomul-es, AY. Sm. in Diseases of 

 Field and Garden Crops, p. 67, fig. 24. 



Parasitic on Isaria fuciformis. Rare. 



It is doubtful whetlier the present species is a good 

 Saprolegnia as at present understood. If the small 

 bodies contained in the large vesicles are true 

 zoospores it is not likely that the bodies called 

 antheridia by Smith are in reality such. The fol- 

 lowing is Smith's further account of tbe organism : — 



''Towards tlie end of 1883, Mr. Greenwood Pirn 

 M.A., F.L.S., and Dr. E. P. Wright, A.M., F.L.S.! 

 detected Isaria fuciformis, B., growing in a new posi- 

 tion, viz. on grass belonging to a silo at the Albert 



