ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 351 



and Cordycepteas. In the present issue lie deals only with the first. To 

 the genera already known he adds two : Chromocrea, with brown spores, 

 each of which divides into two sub-globose cells, thus presenting a sixteen- 

 spored ascus, and Chromocreopsis, also with dark-coloured spores, but, 

 whether simple or septate, always persisting as eight spores in the ascus. 

 For the genus Epichloe has been substituted the older generic name 

 Typkodium of Link. 



Study of Chaetomium.*— G. Bainier has made a renewed examina- 

 tion of Chaetomium and of some of the neighbouring genera. One of 

 the species, C. pineti described by Fuckel, has a small globose fruit 

 without any ostiole, which brings it within the definition of Perisporiaceaa. 

 Bainier, therefore, classifies it under Zopf's genus Chsetomidium. He 

 also describes two new species, Chsetomidium magnum found on dog's dung, 

 and C '. phyllactineum which grew on rotten paper. He re-describes and 

 figures Magnusia nitida, and then passes on to Chaetomium. He finds 

 the hairs that grow on the exterior of the perithecium a distinguishing 

 specific character. The genus has been somewhat imperfectly described 

 hitherto ; now Bainier has made a thorough study of it, and gives 

 descriptions and figures of many new forms. A key to the species is 

 added at the end of the paper. 



Cytology of Yeasts. t — A. Guilliermond criticises a recent paper on 

 this subject published by Peniston and Wager. These authors maintained 

 that the vacuole of the yeast-cell and the small body adhering to it 

 constitute the nucleus. Guilliermond denies the correctness of this 

 view ; the vacuole, he holds, is a secretory structure, since it is coloured 

 while still living by neutral red ; and the body, which Peniston and 

 Wager call a nucleolus, he regards as a nucleus. He finds that this 

 nucleus, when properly fixed and stained, shows a nuclear structure, 

 nucleolus and membrane. After fusion to form the ascus, it is larger in 

 size, and mitotic division can be observed in it. 



Development of Lasiodiplodia Fiorii sp. n.f — P. Baccarini describes 

 this fungus which was found on a branch of Modeccci dbyssinica. It is 

 a member of the Sphaeropsideas, and forms a stroma or pseudostroma on 

 which are developed the pycnidia. No other fruiting condition has been 

 found, and it may be a reduced form with only one type of fructification 

 Baccarini made cultures of spores and mycelium, and he follows in great 

 detail the germination of the spores, the anastomosing of the hypha?. and 

 the formation of the stroma and pycnidia. He found no trace of any 

 fusion that might be considered of a sexual nature, and he did not 

 consider that the anastomosis of the hyphae had any connection with 

 spore formation. He describes two forms of pycnidial growth, the one 

 formed at the surface of the culture, the other formed deeper down : 

 but there was substantial agreement between the two forms. 



Classification of Hyphomycetes.§— P. Vuillemin does not find the 

 accepted method of classification sufficient, as similar or nearly allied 



* Bull. Soc. Mycol. France, xxv. (1910) pp. 191-237 (17 pis.). 

 t Comptes Rendus, cl. (1910) pp. 835-8. 

 % Nuov. Giorn. Bot. Ital., xvii. (1910) pp. 165-91 (17 figs.). 

 § Comptes Rendus, cl. (1910) pp. 882-3. 



