ZOOLOGY AND BOTANY, MICKOSCOPY, ETC. 283 



(2) hymenophores not separable and \Yithout cystidia, the Entolomatinfe 

 — Entoloma, Leptonia, Clitiopilus, Eccilia, Nolatiea, and Claudopus. 

 There are also marked differences between the groups in the trama hyphte 

 of the lamella?. A. L. S. 



Thelephoraceae of North America. IX. — Edwaed Angus Buet 

 {Ann. Miss. Bot. Gard., 1918, 5, 177-203, 14 figs.). This paper takes 

 up the genus Aleurodiscus, of which the type species is A. amorphus 

 {Gorticium amorphum Fries). The author gives descriptions of fourteen 

 species in North America. They are distinguished by peculiar develop- 

 ment of cystidia or paraphyses, some of the latter with outgrowths that 

 have been designated by Burt as of " bottle-brash " form. Several new 

 species are recorded. A. L. S. 



Notes and Observations on Agarics. — P. Konead {Bull. Soc. 

 3Iycol. France, 1919, 35, 143-6). The author gives a descriptive 

 account of lYicholoma tkirinum as found in the neighbourhood of 

 Neuchatel. The contrast between it and other species is pointed out. 

 It is one of the poisonous Agarics. 



Rene Maiee {Bull. Soc. Mycol. France, 1919, 35, 147-9, 1 fig.) 

 publishes an account of Rhodopaxillus nudus {Trkholoma nudum), which 

 had invaded a mushroom-bed and completely ousted the mushrooms. 

 The fungus is an open-air and light-loving plant, and was considerably 

 altered by the changed conditions of habitat, etc. The caps were less 

 developed and the characteristic odour had disappeared, but the niicro- 

 scopic characters were well retained. A. L. S. 



Development of Pluteus admirabilis and Tubaria furfuracea. — 

 Leva B. Walkee {Bot. Gaz., 1919, 68, 1-21, 5 pis., 8 figs.). The 

 various phases of growth in these two fungi have been followed from 

 material collected in the open. In Pluteus special attention is given ta 

 the formation of the cystidia. In both forms the gills originate as folds 

 which develop centrifugally. A. L. S. 



Validity of the name Discomyces for the Genus of Fungi 

 variously called Actinomyces, Streptothrix, and Nocardia. — E. D. 

 Meeeill and H. W. AVade {Fhilippine Journ. Sci., 1919, 14, 55-69). 

 So many names have been used for the fungus causing actinomycosis 

 that the authors have made a definite examination of the question. They 

 arrive at the conclusion that priority must be given to Discomyces, sub- 

 stituted by Rivolla in 1878 for Actinomyces ; the latter name is invalid, as 

 it was previously used for another organism. In a final discussion they 

 give their reasons for rejecting all other designations. A. L. S. 



Additional Resupinate Hymenomycetes from the Weybridge 

 District. — E. M. Wakefield and A. A. Peaeson {Trans. Brit. MycoL 

 Soc, 1919, 6, 136-43, figs.). The species enumerated are additional 

 to the list already published for the district. The authors note the 

 variation of these resupinates in the field. Thus Gorticium bombycinum 

 showed gradations from the typical smooth form to a blunt-toothed 



