206 SUMMAllY OF CUIiKENT ItESEAKCHES KELATING TO 



Hepatics of Patagonia and Tierra del Fuego.* — F. 8tephani gives 

 an account of the hepatics brought back from Patagonia and Tierra del 

 Fuego by tlie Swedish Expedition in 1907-9. The actual collectors were 

 C. Skottsberg and T. Halle ; and of tlie 371 species collected no less 

 than 145 are described as new to science. In the 35 text-illustrations 

 259 separate figures are included. 



Bryophytes of Siam.t— G. C. Hosseus publishes a list of five hepa- 

 ticae and fifteen mosses collected by him in Siam in 1904-5, and deter- 

 mined respectively by F. Stephani and V. F. Brotherus. One hepatic 

 and three mosses are new to science. 



Thallophyta. 

 Algse. 



(By Mrs. E. S. Gepp.) 



Algological Notes. J — 0. Nordstedt publishes another instalment of 

 algological notes. 5. He explains why Klitzing renamed Stereococcus 

 and called it Gongrosira. Having blundered in describing the former 

 genus Klitzing redescribed it and gave it a new name. 6. He discusses 

 the date of Kiitzing's Microcystis, which he considers should be 1843. 

 7. He claims that Phyl litis Kiitz. cannot be maintained, because it was 

 forestalled by PhylUtis Hill (1756), and he discusses the various genera 

 to which the name Iha has been applied. 



Algse and their Uses.§ — B. Perrot and C. L. Gatin treat of the 

 useful marine algfe and especially the edible algas of the Far East. Their 

 work is divided iuto three ptarts. 1. Algw used as food and in industry, 

 especially in the Far East ; the anatomy and chemistry of the algae. 



2. Botanical characters of economic algae with figures ; sea-weed industry 

 in the Far East ; chemistry of algfe ; alimentary and therapeutic values 

 of algaj ; algal products — agar-agar, gelose, Ceylon-moss, vegetable glue. 



3. Importance of sea-weed industry and of its possible extension in the 

 Indian Ocean, etc. 



Algal Figures formed in Flasks. || — L. Lutz writes on the vertical 

 lines traced by unicellular algas on the sides of culture flasks. In trying 

 to explain the vertical lines he discusses the action of gravity and the 

 intensity of light, the latter of which he thinks to be the principal factor. 

 And as to Molliard's experiment of vertical lines formed by algae in an 

 inclined glass tube, he thinks here also the effect is caused by light with 

 perhaps the aid of gravity. 



Oxyrrhis and Nephroselmis.lf — G. Senn writes on Oxyrrhis and 

 NephroseJmis and other EuflagellatiB, and on their systematic position. 

 He considers that Oxyrrhis marina does not lielong to the Flagellatge in 



* H. Svensk. Vetensk. Handl., xlvi. No. 9 (1911) 92 pp. 

 t Beih. Bot. Centralbl., xxviii. 2te Abt. (1911) pp. 361-3. 

 X Bot. Notiser (1911) pp. 263-6. 



§ Ann. Inst. Oceanogr., iii. 1 (1911) 101 pp. (10 pis. and figs.). 

 II Bull. See. Bot. France, Iviii. (1911) pp. 104-9. 

 4 Zeitschr. wiss. Zool.,xcvii. (1911) pp. 605-72 (2 pis. and figs.).! 



