754 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Paviliabd, J., & J. Lagarde — Myxomycetes from the neighbourhood of 

 Montpelier. 



[A descriptive list of the species collected, with some notes on nomenclature.} 

 Bull Soc. Mycol. France, XIX. (1903) pp. 81-105(1 pi.). 



Smith, Wort hi ngton G. — Hygrophorus Clarkii B. and Br. 



[Notes on the history of this species, which is probably identical with » 

 more recently recorded species of H. laititabundus Britz.] 



Journ. Bot., XLI. (1903) pp. 313-4. 



„ „ „ Lentinus Lepideus Fr. 



[A general account of the abnormal forms of this fungus. A C'farana-like 

 form was found recently in Scotland.] 



Journ. Bot, XLI. (1903) pp. 321-3 (figs.). 



„ „ „ Agaricus versicolor Wittr. 



[The writer clears up the confusion that lias arisen in describing and re- 

 describing this plant. It is really a small form of A. melleu*.] 



Journ. Bot., XLI. (1903) pp. 341-3. 



Speggazini, C. — Argentine Fungi. 



Anal. Mus. Nation. Buenos Aires, VIII. (1902) pp. 49-89. See also 



Centralll BaJct, X. (1903) p. 71. 



Strawson, G. F. — Fungicides. 



[A manual of description and instruction as to the preparation and applica- 

 tion of various sprays.] 



Standard Fungicides and Insecticides in Agriculture. By 



G. F. Strawson. Part 1, 76 pp. 



Zahlbruckner, A. — New Lichens. 



[A series of new European forms. There is one new genus, Pseudoheppia.] 



Ann. Mycol, I. (1903) pp. 354-61, 



i Schizophyta. 



Schizophyceee. 



Cyanophycese.* — F. Brand gives some of the results of his investiga- 

 tions on the morphology and physiology of this group. He deals with 

 his subject under several headings. The first is " Resting-cells (spores) " 

 in which he compares his own results with those of other authors and 

 gives a list of the orders in which these bodies occur. " Heterocysts " 

 are then dealt with under development of the heterocysts, pores and 

 polar thickening of membrane, contents of heterocysts, and physio- 

 logical and biological meaning of heterocysts. "Gonidia and micro- 

 gonidia " is followed by a section headed " Spaltkorper." This term is 

 used to denote the ring-like bodies which are seen separating two pre- 

 viously contiguous cells, as in Calothrix confervkola. " Active move- 

 ment of the hormogonia," is the title of the last section, which gives in 

 detail the results of various observations made by the author, together 

 with remarks on the work of other writers. A bibliography follows. 



;Schizomycetes. 



Thiophysavolutans.f — G. Hinzehas given this name to a colourless 

 sulphur bacterium which was found among the sand near to sulphur 

 wells in the neighbourhood of Naples. The organism is globular,. 



* Beih. Bot. Centralbl., xv. (1903) pp. 31-64 (1 pi.). 

 t Ber. Deutsch. Bot. Ges., xxi. (1903) pp. 309-16 (1 pi.). 



