544 SUMMAKY OF CURRENT RESEARCHES RELATING TO 



Two West Indian Brown Algae.* — F. Boergesen describes the 

 structure of two crustaceous brown algre from the West Indies, Ralfsia 

 expansa J. Ag. and Aglaozonia canarimsis Sauvageau. The type of the 

 former series is sterile ; it was collected at Vera Cruz and is preserved at 

 Copenhagen. Its identity with the plant from St. Thomas and St. Jan 

 enables the author to give for the first time a full description of the 

 species together with figures. A. canariensis was described some years 

 ago by Sauvageau, but without figures. These are now supplied, with a 

 description of the development of the thallus. The author considers 

 that Ralfsia ceylanica Harv. and Zonaria parvula Grev. var. duplex 

 Heydrich may be identical with this species. 



Ceramium.t — A. Mazza continues his notes on oceanic algse, and 

 passes under review the following species :—Ceramium rubrum, G. obsole- 

 tttm, C. flahelligerum, G. graciUimam, G. strictwn, giving an account of 

 their morphology and specific characters. 



East African Marine Algse.^ — B. Schroder, in reporting upon the 

 -cellular plants collected in East Africa during the short expedition of 

 H. Winkler and C. Zimmer in the summer of 1910, gives a list of 

 «2 marine algfe determined by T. Reinbold and R. Pilger. The speci- 

 mens were gathered at Mogadischu in Italian Somaliland, at Kilindini 

 by Mombasa, and at Tonga and Ulenge island in German East Africa. 



Fungi. 



(By A. LoBRAiN Smith, P.L.S.) 



Swiss Phy corny cetes.§ — M. B. Tiesenhausen has examined samples 

 of water from about eighty different ponds and lakes in Switzerland, 

 especially in high mountainous areas. He found eighteen species and 

 varieties of fungi belonging to Monohlepharis, SaproUgnia, Achlya, 

 Dictyuchus, and Sapromyces, many of them new to the country. He 

 found also two moulds, S&pedonium. natans, and a new genus, Sporoclema 

 pirifonne. The fungi grow up to the snow line : the highest point at 

 which a SaproUgnia was found was 2'.)00 metres above sea level. 



Notes on Microfungi.|l — B. Nemec has found in the cortical cells of 

 the beet a new fungus akin to OJpidium, which he calls Sorolp)idiuM 

 Betae g. et sp. n. He considers that it belongs to the Plasmodiophoraceae, 

 which, however, require more exact study. A careful study of Uromyces 

 Betse proved the existence of haustoria. When these come in contact 

 with the host nucleus they tend to degenerate. He also thinks that 

 Ericksson's plasma nucleoli may be degenerate haustoria. On Salicornea 



* Nuov. Notar., xxiii. (1912) pp. 123-9 (figs.). 



t Nucv. Notar., xxiii. (1912) pp. 109-22. 



% Hedwigia, lii. (1912) pp. 289-304. 



§ Arch. Hydrob. Plankt., vii. (1912) pp. 261-308 (24 figs.). See also Ann. 

 Mycol., X. (1912) pp. 832-3. 



II Bull. Int. Acad. Sci. Boheme (1911) 19, 10 and 10 pp. (2 pis.). See also Bot. 

 Centralbl., cxx. (1912) pp. 13-14. 



