ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 393 



very similar to G. Gesatii, though probably specifically distinct. The 

 parasite has not previously been noticed on this mildew. The author 

 gives a list of all the recorded species of Gicinnobolus, sixteen in all, and 

 the mildews on which they are parasitic. He does not think it will be 

 of great importance in the destruction of the mildew, as it does not 

 appear until the Oidium generation is well over. 



Gicinnobolus sp. parasitic on Oak Mildew.* — Paul Vuillemin found 

 this parasite in the forests near Nancy. The oak mildew has spread 

 with alarming rapidity, but Vuillemin thinks that possibly this parasite 

 which lives on the mycelium of the mildew may act as a natural check ; 

 it appeared towards the end of a rainy season, but another year it is 

 hoped that it may develop earlier and be more destructive to the mildew. 

 The species has not been determined. 



New Hyphomycetes.f — G. Bainier records the discovery of a new 

 genus, Radaisiella (E. elegans). It was found growing on dead Banana 

 leaves, and is allied to Botryosporium and Polyactis. The fungus 

 was cultivated easily on artificial media, but no other life-stage was 

 formed.^ Bainier also describes a new species of Gliocladium found 

 growing on damp straw, and, associated with it, numerous perithecia 

 very similar to those of Eurotium. The new species Gliocladium proli- 

 Uniiii is entirely white. 



Parasitic Fungi. §— C. K. Bancroft records the results obtained by 

 artificial cultures of Gladosporium herbarum. He found that there were 

 two distinct forms, one parasitic, Hormodeiidron, and one saprophytic, 

 Gladosporium. The former is the summer form, and produces disease 

 on the leaves of various plants such as Brassica, Guc'umis, Ifalva, Phlox, 

 etc. Conidia of Gladosporium when placed on living leaves gave rise to 

 conidia of Hormodendron, and the latter infected the leaves. In winter 

 Cladosporiu7n exists in the form of microsclerotia, which germinate in 

 spring, and give rise to Gladosporium spores. The author has also 

 shown that G. epipkyllum is a form of G. herbarum. 



Monograph of Fusarium.|| — 0. Appel and H. W. Wollenweber have 

 made a thorough study of this genus of Hyphomycetes, by means largely 

 of culture methods. They have thus been able to contrast the mor- 

 phology and biology of the different systematic species. They describe 

 those which they consider of special value, thirteen in all. As a diag- 

 nostic character, they found the form of the spores more constant and 

 more important than the septation. The conidiophores are more com- 

 plicated in the more highly-developed species of the genus. As a result 

 of their studies, the authors are able to reduce largely the number of 

 species. They include Fusoma and Pioanotes in Fusarium. Finally, they 

 discuss the relationship of Fusarium to higher fruiting forms, Neckia, 

 Neocosmospora, and Gibberella. 



* Bull. Soc. Mycol. France, xxvi. (1910) pp. 390-3. 



+ Tom. cit., pp. 382-4 (lpl.). J Tom. cit., pp. 385-9 (1 pi.). 



S Ann. Bot., xxiv. (1910) pp. 359-71 (1 pi.) 



l| Arb. k. Biol. Anat. Land-Forstw., viii. (1910) pp. 1-207 (3 pis. and 10 figs.). 

 See also Centralbl. Bakt., xxix. (1911) pp. 215-7. 



