68 SUMMARY OF CURRENT RESEARCHES RELATING TO 



New Zealand Marine Algae.* — R. M. Laing concludes his list of 

 New Zealand algae begun two years ago, and enumerates 291 species of 

 Florideae. Three species of Chlorophyceae are given in an addendum, 

 bringing the list up to 389 in all, including the contents of this and 

 the previous paper. In this part a new species of doubtful position is 

 described, Nitophyllum microphyllum Crosby Smith, and a new variety, 

 tumescens of Champia Noiw-zelandm Hook, et Harv. 



Fungi. 



Fertilisation in the Phycomycetes.f — W. Ruhland publishes a 

 preliminary note on this subject which he has studied in Albugo Lepigoni 

 and in several species of Peronospora. A more detailed paper will 

 appear later. 



Amylomyces Rouxii.ij:— J. Turquet has conducted a series of culture 

 experiments on this Chinese " yeast " used in the fabrication of wines 

 and spirits from rice. He has succeeded in growing the aerial form, 

 a branched Mucor with brownish sporangia and minute oval spores. 

 Chlamydospores are also formed in the hyphse. The author names it 

 M. Rouxii. 



Sprouting of Yeast-Cells.§ — Albert Hirschbruch concludes his 

 paper on the development of yeast-cells. He follows out the division 

 of the nuclei, and the accumulation of protoplasm in the daughter-cell 

 which remains attached to the mother-cell until it is of sufficient size 

 to be independent. In the species studied by him, Saccharomyces ellip- 

 soideus Hansen, division of the nucleus is by mitosis. The plate in 

 illustration of the paper is to be published in the following number of 

 the journal. 



Spore-formation in Yeast. || — ; M. A. Guillermond has studied this 

 subject in Saccharomyces Ludwigii. It had been noted by Hansen that 

 in this species the yeast-cell produced a germinating tube which he 

 called a promycelium, and from which were formed the new cells. 

 Guillermond finds that there is frequent conjugation betweeen two cells 

 and fusion of nuclei previous to new cell-formation. 



Origin of Yeast. If — G-. Odin contributes a note on this question. 

 He has been experimenting with forms of Penicillium, and he finds 

 that by cultivation from the spores he obtains in a few generations a 

 yeast form that is perfectly stable, and will continue to form yeast- 

 spores even on solid substances. The writer has not yet determined if 

 these yeasts so obtained will remain indefinitely stable. 



Cell-Nucleus of Saccharomycetes and Bacteria.** — Marpmann 

 discusses the present state of our knowledge as regards the presence 

 of nuclei in yeast and bacteria. In the former the nucleus had 



* Trans, and Proc. New Zeal. Inst., xxxiv. (1901) pp. 327-59. 

 ,t Hedw. Beibl., xli. (1902) pp. 178-80. 

 X Comptes Rendus, cxxxv. (1902) pp. 912-5. 

 § Centralbl. Bakt., ix. (1902) pp. 513-20. 

 || Comptes Kendus, cxxxv. (1902) pp. 708-10. 

 % Tom. cit., cxxxv. (1902) pp. 479-81. 

 ** Centralbl. Bakt., ix. (1902) pp. 357-61. 



