258 S. Reginald Price. 
although it was impossible entirely to exclude the latter. The large 
spores, however, failed to exhibit any signs of germination. Any 
conidia that were present germinated readily and produced the 
characteristic “ organs of attachment” in profusion, indicating that 
the fungus was in a normal condition (Figs. 7 and 8). 
No account of exactly similar structures has been found, and 
since details of their germination and development are lacking, it 
is hardly possible to determine their real nature with any degree 
of finality. 
Certain Oidial conditions of Botvytls described and figured 
by Istvanffi (2) seem to shew structures, perhaps somewhat of the 
same nature, but a detailed comparison indicates that there are 
important differences between them and the spore-forms now 
described. The spores under consideration are more definite in 
position and mode of occurrence than in Istvd.nffi’s oidial frag¬ 
mentation, and moreover they are borne on the sclerotia, whereas 
the oidia were produced from young artificial cultures in the 
filamentous state. There also appears to be a difference in the spore 
contents: Istvanffi describes the oidial contents as “ du plasma 
extraordinairement transparent (et) ecumeux,” while the contents 
of the “ resting spores ” are “ ecumeux,” but rather opaque and 
yellowish brown in tint. The spore diameter is about the same 
in each case (40-80/a for the oidia), and bearing in mind the 
different environment, the manner of formation is not altogether 
dissimilar. 
The structures produced by the type of fragmentation 
described by Farneti (3) also appear to be different. 
Istvdnffi (2), Brooks (1) and others have shown how great is 
the plasticity of Botrytis cinerea under cultural conditions, and the 
present observations show that yet another spore-form may 
occasionally be present in natural conditions. 
Whatever their homology, there seems little doubt that the 
structures function as resting spores of some type. 
Certain stages in their formation, and similarities in position 
and branching between the hyphae bearing resting-spores and 
conidia respectively, may indicate that the resting-spores are 
structures homologous with the upper parts of conidiophores, 
in which the sterigmata have become suppressed. This may 
have been influenced by external conditions, so that the incipient 
conidiophore ceased to function as such, but enlarged to form 
a food-storing spore, while later on, under more favourable 
