ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 191 



SMarine Algae.*— A. Mazza continues his studies on the structure of 

 marine algae, and in the present contribution treats of the genus Grate- 

 loupia (7 species) and of HaUjmenia (9 species). 



Marine Algae of Vancouver Island.f— F. S. Collins publishes a 

 flora of the marine algae of Vancouver, bringing our knowledge as far as 

 possible up to date. Myxophyceas and Diatomaceas are not included. 

 Valuable observations are made on geographical distribution. A new 

 species of Ckantramia is described, G. Macounii, and several new varieties 

 of other species. A key to the forms of Rhodomela and lontkaUa that 

 occur on the Pacific coast is inserted to facilitate identification. 



Japanese Marine Algae.i — K. Okamura publishes a list of the 

 marine algae of Chosen, numbering 102 species. Among them is a new 

 species Ecklonia stolonifera, which he describes and figures both in habit 

 and structure. Interesting facts regarding geographical distribution are 

 brought out. 



Fungi. 

 (By A. Lorrain Smith, F.L.S.) 



New Genus of Chytridiaceae.§— R. Nemec gives an account of the 

 new fungus Anisomyxa Plantaginis, which he discovered on the roots of 

 Plantago lanceolata on sandy soil near Prague. The fungus was lodged 

 in the growing parts of the root but not in the meristematic cells. The 

 youngest stage was a uninucleate plasma-body in the hypodermal cell 

 of the host ; later were to be found multinucleate bodies which filled the 

 interior of the cell. Coalescence between parasites was not seen. Two 

 kinds of sori are formed of small and of larger sporangia, both at first 

 uninucleate, later multinucleate. The contents of the sporangia break 

 up into zoospores. The author describes the cytology of the fungus ; 

 nuclear division in the vegetative period differed from that of the genera- 

 tive. A discussion follows as to the cytological relationship between 

 the different genera of the family. He includes Plasmodiophoraceae in 

 the family. 



New Genus of Saprolegniacese.||— B. Nemec found the new fungus 

 Jaraia Salicis parasitic on the roots of Salix sp., his attention having 

 first been called to it in a water culture of S. purpurea. He was able 

 to infect S. amygdalina and S. viminaUs with the fungus, but S. alba 

 remained immune. It fructifies on the meristematic cells of the root- 

 apex and induces a gall-formation. The zoosporangia are crowded, and 

 small, irregular, and variable in appearance, and formed in rows on the 



* Nuov. Notar., xxiv. (1913) pp. 157-74 ; xxv. (1914) pp. 1-34. 



t Canada, Victoria Memorial Museum, Bull. No. 1 (1913) Ottawa, pp. 99-137. 



% Rep Imp. Bureau Fisheries, Sci. Investigations, ii. (1913) pp. 17-30 (I pi.). 



§ Bull. Internat. Acad. Sci. Boheme (1913) 15 pp. (2 pis and 7 rigs.). See also 

 Bot. Centralbl., cxxiii. (1913) pp. 442-3. 



|| Bull. Internat. Acad. Sci. Boheme (1913) 12 pp. (12 figs.). See also Bot. 

 Centralbl., cxxiii. 503-4. 



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