ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 85 



district. Then follows the systematic enumeration of the 409 sp9cies 

 i-ecorded, of which 2 are endemic : Folysiphouia rhunensis and Stereo- 

 coccus MalanUi. The author considers this list as likely to be enlarged, 

 however, by further discoveries of parasitic and endophytic species. 

 Following the systematic list is an interesting series of notes, systematic 

 and morphological, on many of the genera and species. The work is 

 completed by lists of species to be found at the various seasons of the 

 year. 



Marine AlgaB of Iceland.* — H. Jonsson publishes a book on the 

 marine alg^e of Iceland, which is a first instalment of a general account 

 of the botany of that island. After giving a systematic list of the 2u0 

 species recorded, the author deals fully with the life-conditions of the 

 marine algal vegetation (nature of the coast, ocean, air, light) ; the 

 horizontal distribution of the species and the components of the algal 

 flora ; comparison with neighbouring floral districts ; the vertical dis- 

 tribution of the species ; marine algal vegetation and sea-grass vegeta- 

 tion ; differences in the vegetation in east and south Iceland ; and 

 some notes on the biology of the alg£e along the coast of Iceland. 



Scandinavian Algge.f — 0. Xordstedt publishes a complete enumera- 

 tion of the alga3 of Scandinavia, including Characese and the blue-green 

 alga3, but omitting Diatoms. The genera represented number 376. The 

 paper forms part of a work issued by the Lund Botanical Club on the 

 plants of Scandinavia. 



Australian Marine Algae. J — A. H. S. Lucas publishes a supple- 

 mentarv list of the marine als:^ of Australia, which includes the su]> 

 family Dasyese, and a more complete list of the Cryptoneminge ; as well 

 as additions to the Corallinacea^. The marine species of the Australian 

 Chlorophycese are also appended. 



FuEg-i. 

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



Haustoria of Peronospora parasitica.§— Z. Chmielewski has de- 

 monstrated that the hyphse of this fungus occupy the intercellular spaces 

 of the host-plant, and that the haustoria alone penetrate the cells. In 

 many cases the cell-membrane of the haustorium becomes thickened by 

 a wall laid down by the protoplasm of the host-cell as a method of 

 defence against the fungus. 



Development of Blastocladia strangulata sp.n.||— The genus 5/«s- 

 tocUclia has been somewhat uncertainly placed among the Phycomycetes, 



* Eosenvinge and Warming. The Botany of Iceland. Copenhagen : Frimodt, 

 and London : Wheldou, 1912, pt. 1, 186 pp. (figs.)- 



t Skandiuaviens Vaster, 3. Alger. Lund : C. W. K. Gleerup (1912) 78 pp. 



X Proc. Linn. Soc. New South Wales, xxxvii. (1912) pp. 157-71. 



§ Kosmos, Lemberg, xxxvii. (1912) pp. 126-32 (9 figs.). See also Mycol. 

 Centralbl., i. (1912) p. 317. 



II Bot. Gaz., liv. (1912) pp. 353-71 (3 pis.). 



