ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 597 



from pursuing the research further and could not attempt the infection 

 of plants from his cultivated mycelium, as he had intended. 



Schizophyta. 

 Schizophycese. 



Flora of Hot Springs.*— G. S. West publishes a list of 56 species 

 and varieties collected in hot springs in Iceland. Aulosira thermalis is 

 a new species, and Galothrix parietina has a new variety thermalis. 

 Oseillatoria proboscidea and 0. numidica occur there. Three species are 

 also recorded from a hot spring in the Malay Peninsula, two of which, 

 Simploca Yappii and Phormidium orientate, are new. 



Observations on Aphanochsete.f — F. E. Fritsch gives the results of 

 observations on A. pohjehsete Fritsch, taken at intervals for a period of 

 over sixmonths. He describes and figures various stages in its life-historv, 

 but can give no details as to its reproduction. He considers his plant 

 identical with Herposteiron polyclveete Hansg., and transfers it, together 

 with H. confervicola Nag., to the genus Aphanoeltsete. The genus Herpo- 

 steiron should be dropped, according to this author, who finds that the 

 septate hairs described for this genus do not really occur ; neither do the 

 hairs have a sheath at their base. An accouut of work already published 

 on Aplianoclisete and the neighbouring genera is given, and a scheme of 

 classification, based on the author's own observations. The frequent 

 occurrence of cells with red granular contents is described in connection 

 with A. polychsete, but as yet no clue has been found to the part they 

 play in the life-history of the alga. The author has found similar cells 

 while examining young plants of Stigeoclonium. 



Schizomycetes. 



Fermentation of Cellulose.! — V. Omelianski finds two species of 

 bacilli which effect fermentation of cellulose, and are widely distributed 

 in soil, manure, sewage deposits, river mud, &c. One species effects a 

 hydrogen fermentation of cellulose, yielding hydrogen, carbon dioxide, 

 and butyric and acetic acids. The other effects methane fermentation, 

 yielding methane, carbon dioxide, and the same fatty acids. Neither of 

 the species is identical with Bacillus amylobacter, which, according to 

 van Tieahem, is the chief organism which attacks cellulose. 



Parasitism of Pseudomonas destructans.§— M. C. Potter describes 

 the action of this bacterium on living cells of the turnip. The cells were 

 rapidly killed by the toxin secreted by the parasite, which then pene- 

 trated the walls and entered the cell-cavities. The bacterium had no 

 power of penetrating or destroying the fully developed cuticle of the 

 epidermis, but can readily effect an entrance through the young unde- 

 veloped epidermis. 



Infection by Paracolon Bacillus.|| — Strong describes a case of 

 infection occurring at Santa Cruz, simulating and diagnosed as typhoid 



* Journ. Bot., xl. (1902) pp. 241-8 (1 pi.). 



t Ann. Bot., xxi. (1902) pp. 403-12 (7 figs.). 



J Centralbl. Bakt., 2" Abt., viii. (1902) pp. 193-201, 225-31, 257-63, 289-91, 

 321-6, 353-61, 385-91 (1 pi. and 1 fig.). 



§ Proc. Boy. Soc, lxx. (1902) pp. 392-7 (2 figs.). ...... 



|| Bep. Surg.-Gc-n. on Prevalent Diseases among Troops in the Philippines, 1901. 

 See Bull. Johns Hopkins Hosp., xiii. (1902) pp. 107-8, 



