ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 341 



been published, but the list includes many plants not before described. 

 The new genera are all monotypic ; they are : — 



Aschersoniopsis, the conidial condition of some Hypocrella. The 

 conidiophores rise from a flat, horny stroma, and bear lateral, spicate 

 conidia, which are subglobose and colourless. It giowson bamboo leaves. 



Moelleroclavus, a member of the Xylariaceae, has only the conidial 

 condition fully developed ; the ascophorous stroma is subclavate and 

 dark-coloured, with immersed perithecia, which are immature. 



Stilbohypoxylon, a neighbouring genus, has a dark-coloured, sub- 

 globose stroma, the perithecia are immature. Conidia are acrogenous, 

 subglobose, brownish. 



Midotiopsis, placed among the Dermatiacere, has erumpent, less or 

 more stalked ascomata ; the exterior is slightly tomentose, the spores 

 are globose and colourless. 



Bulgariopsis has elongate, continuous, colourless spores ; the ascomata 

 resemble those of Bulgaria polymorpha. 



Moellerodiscus is allied to Cudoniella. The spores are sub fusiform, 

 colourless, continuous. 



Sylloge Fungorum.*— The sixteenth volume of Saccardo's Sylloge, 

 which forms part v. of the Supplement, is issued under the joint editor- 

 ship of P. A. Saccardo and P. Sydow. The book may be divided into 

 three divisions : the first, of 382 pages, is occupied by the Basidiomycetes 

 including the Uredinaceae. To the Ascomycetes are allotted about 400 

 pages. The last great group of Fungi Imperfecti extends over nearly 

 300 pages. Both the Sphaeropsideee and the Hyphomycetes are included 

 under one term the Deuteromycetae. There are 32 new species of Fungi 

 in the volume that have not been published elsewhere. A list of these 

 is given at the beginning. The authors promise at an early date a uni- 

 versal index with the names correctly accentuated. 



Protophyta. 

 Sehizophyceee. 



^ 



Oscillaria prolifica.f — Isabel F. Hyams and Ellen H. Bichards 

 describe the life-history of Oscillaria prolifica, as seen and studied 

 in Jamaica Pond, near Boston. The authors have kept records of 

 its occurrence and condition during thirteen years, and they find that 

 a certain regularity is observed with regard to its seasonal appearance. 

 A table of dates is given, taken from notes made in 1901. The various 

 stages of development in the alga are shown in figures, and reproductions 

 of photographs show the masses of Oscillaria floating on the surface of 

 the pond. A further contribution to the subject is promised, which 

 will deal with chemical considerations in connection with the food of the 

 plant. 



Schizomycetes. 



Nitrogen- Assimilating Bacteria in Soils.J — Neumann prepared l^ 

 extracts of the roots, stems, and leaves of Vicia fdba, and of peaty soil, 



* Sylloge Fungorum, Supp. Univ., pars v. (1902) 1291 pp. 

 t Technology Quarterly (Boston), xiv. (1901) pp. 302-10 (8 figs.). 

 X Landw. Vemuchs-Stat., lvi. (1901) pp. 203-6. See Journ. Cheni. Soc, 1902, 

 Alittr. ii. p. 163. 



