474 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Japanese Algae. — K. Okamura,* who has published six numbers of 

 " Illustrations of the Marine Algae of Japan " during the last few years, 

 is now continuing the series under the title of " Icones of Japanese 

 Algae." Six parts have already appeared, each of which contains five 

 quarto plates. The figures show the habit of each alga as well as the 

 details of its structure, and they are all accurately and clearly drawn. 

 Descriptions in English are given for those species which are either new 

 or little known. 



Algae of Middle Europe.! — W. Migula continues the publication of 

 his " Kryptogamen-Flora," which occupies vols, v.-vii. of Thome's " Flora 

 von Deutschland, Osterreich und der Schweiz." The Chlorophyceaa are 

 brought to an end in Part 48, a full index being provided. In Part 49, the 

 treatment of the Rhodophyceas is begun ; the group of the Bangiales 

 occupying but a few pages, the remaining group — Florideae — is soon 

 reached, and the following four orders of Florideas are discussed — 

 Nemalionales, Gigartinales, Rhodymeniales, and-Cryptonemiales. Keys 

 to the 'families, genera, and species are supplied ; and brief and clear 

 descriptions of them all are given, further assistance being afforded by 

 means of figures. 



Oceanic Algae.f — A. Mazza continues his studies of marine algas, 

 and treats of some of the Delesseriacege, giving critical notes upon three 

 species of Martensia and ten species of Nitophyllum. 



Calcareous Algae. § — M. Foslie publishes the fourth part of his 

 Algological Notes, in which he describes a number of species of Litho- 

 thamnion, Goniolithon, Lithophyllum, Melobesia, and Mastophora, from 

 all parts of the world, most of them new to science. On the species 

 previously known he gives interesting notes. The paper is written in 

 Norwegian. 



■'b- 1 



Griffithsia acuta Zanard.|| — G. B. De Toni gives an account of 

 Griffitlisia acuta, an unpublished species found in Zanardini's herbarium, 

 and gathered at Alexandria in Egypt, perhaps by Portier. It is a 

 sterile plant. De Toni compares its dimensions carefully with those of 

 G.furcellata and G. Duriaei, and other species. 



. Critical Notes on Laminariaceae.^ — W. A. Setchell publishes some 

 critical notes on Laminariaceas. He has succeeded in discovering what 

 must be the type of Areschoug's Hafgygia Ruprechtii, misplaced and 

 labelled with another name in Areschoug's herbarium at Stockholm. 

 In habit, colour, lack of bullae, it closely resembles Laminaria bullata f . 

 cuneata of Setchell and Gardner, but appear to differ in length of stipes 

 and position of mucilage ducts in the stipes. There is great need for 

 a study of the forms referred by Kjellman and others to L. ballata. 



* 



Icones of Japanese Algse. Tokyo : 1907-8, i. Nos. 1-6 (30 pis.). 

 + Gera : P. von Zezschwitz, vi. 1 (1907) lief. 4=0-8, pp. 673-918 (47 pis.) ; also 

 vi. 2 (1908) lief. 49-53, pp. 1-144 (25 pis.). 

 X Nuov. Notar., xix. (1908) pp. 49-66. 

 § Kgl. Norske Vidensk. Selsk. Skrift, No. 6 (1907) pp. 30. 

 || Nuov. Notar., xix. (1908) pp. 85-9. f Tom. cit., pp. 90-101. 



