Algae. 52S 



Keeble, Frederick and F. W. Gamble, On the Isolation of the 

 Infecting Organism („Zoochlorella") of Convoluta 

 roscoffensis. (Proceedings of the Royal Society. Ser. B. Vol. LXXVII. 

 No. B. 514. London, November 1905. p. 66—68.) 



The authors give a preliminary account, I) of experiments 

 proving that the green cells („Zoochlorella) of Convoluta roscoffensis 

 result from infection from without; 2) of the means whereby the 

 infecting organism may be cultivated outside the body of the 

 aiiimal; and 3) of the nature of the infecting organism. A detaiied 

 account is given of the nature of the infecting organism, which in the 

 opinion of the authors belongs to Chlorophyceae and is allied to 

 Chlamydomonas. The presence of four equal flagella suggests that 

 they belong to the genus Cartcria. E. S. Gepp-ßarton. 



Kjellman, f. R., Om främmande alger ilanddrifna vid 

 Sveriges västkust. [Angetriebene fremde Algen an 

 der Westküste Schwedens.] (Arkiv för Botanik. Bd. V. 

 No. 14. p. 1—10. Upsala u. Stockholm 1906.) 



Die Verbreitungsmittel der Meeresalgen werden in der letzten 

 Zeit von nordischen Botanikern vielfach diskutiert. Als ein Beitrag 

 zu dieser Diskussion stellt Verf. einige von seinen früheren Beob- 

 achtungen zusammen. Als angetriebene Algen an der Westküste 

 Schwedens sind jetzt folgende Arten beobachtet: Cladophora s\i., 

 Enter omorpha compressa, Pylaiella litoralis, Ectocarpas tomentosus, 

 E. confervoides, Elachista fuscicola, Laminaria saccharina, Alaria 

 esculenta, Ascophyllum nodosum, Himanthalia lorea, Cliantransia 

 sp., Rhodymenia palmata , Choreocolax polysiphonia und Polysi- 

 phonia fastigiata. Verf. findet es am wahrscheinlichsten, dass die 

 von ihm beobachteten angetriebenen Exemplare von der Westküste 

 Norwegens stammen. Zuletzt bespricht Verf. die Möglichkeit, dass 

 solche von weitem angetriebenen Algen im neuen Lande sich ver- 

 mehren und dadurch einbürgern können. N. Wille. 



Robinson, Charles Budd, The Cliareae of North America. (Bulletin 

 of the New York Botanical Garden. IV. june 13, 1906. p. 244 

 —308.) 



The author begins with an account of the general morphology 

 of the Characeae, indicating the basis for recognizing the two sub- 

 families Nitelleae and Cliareae, and subsequently reviews briefly the 

 systematic treatment accorded the family, with reference to the 

 Historie researches of various European writers and particularly 

 to those of A. Braun. A Synopsis is given of the 6 genera com- 

 prising the family. Of the 4 genera of the Cliareae, only one, 

 Chara, is known from North America; and the present paper is 

 therefore a monograph of the genus Chara in North America. 

 The development, morphology and anatomy of Chara is briefly 

 traced, with mention of the relative diagnostic values to be assigned 

 to purely vegetative structures and to measurement and shape of 

 spores and sporocarps. (In the latter connection several sources of 

 possible error are indicated.) 



The North American species of Chara to the number of 50 

 are fully described, and the geographic distribution, illustrations and 

 exsiccatae of each are given. The following are described as new 

 by the author: Chara pallida, C. crinitiformis, C. hypnoides^ 



