180 SUMMARY OF CURRENT RESEARCHES RELATING TO 



found that the blue rajs caused the spores to come to rest ahnost im- 

 mediately, and active cellular division to take place. The red rays were 

 favourable to the mobility of the spores, and hindered cellular division. 

 Green rays do not hinder cellular division, and even perhaps encourage it. 



Synura uvella.* — W. Conrad describes and figures a filamentous 

 state of Synura uvella^ a Chrysomonad with two equal cilia. Usually 

 the colonies are spherical with ovoid individuals attached by their acute 

 ends around a central point. Frequently the colonies are filamentous, 

 or form cylindric masses around a filamentous axis 260-300 />t long. 

 The filament is proper to the colony, and is not of foreign origin. The 

 author appends a list of the plankton species obtained from the Kappen- 

 berg Moat in February and March. 



Survey of Oriental Lakes. f— A. Forti pubHshes a preUminary notice 

 of a limno biologic survey of the Orient ; and gives a long table of 

 338 species of plankton, both animals (96), and plants (242), with their 

 superficial and vertical distribution in sundry lakes of Eastern Europe 

 and Anatolia. The algae belong to the following groups : Myxophycese, 

 Mastigophora, Chlorophycese, Cystoflagellatae, Peridiniacese, Bacillarieae, 

 Conjugatag. 



Portug-uese Plankton.J — L. W. Carrisso publishes the second part 

 of his report of the plankton material collected on the coast of Portugal. 

 In the first part, the author treated of the Porocentracea? and the 

 Peridinie^e. In the present paper, he enumerates the Bacillariaceae, 

 which amount to fifty-one species. A table shows the time of collection 

 and the frequency of the species. 



Peridinieas resembling Flagellates and AIg8e.§ — G. Klebs has 

 examined numerous new organisms resembling Peridiniea^, and seeks to 

 show the connexion between this group and Algse and Flagellatse. 

 Certain new brown-coloured horned cysts, which occasionally develop 

 Peridiniean swarmspores, are placed in the new genus Gystodinium in 

 Peridiniege. Another new genus, Hypnodinium^ shows typical Peridiniese 

 furrows. The old Pyrocystis and other new genera are also shown to 

 l)elong to Peridiniese. Among the forms examined, two types were 

 observed : the filamentous without a nucleolus, and the fine-grained with 

 a nucleolus. They are, however, not fundamentally different. The 

 author claims that the scheme drawn up by him twenty years ago still 

 holds good as regards the relationship of Peridiniese and other Protista. 

 He gives here a clear systematic synopsis of the newly descri1)ed species. 



Fresh-water Phytoplankton of Java.||— J. Woloszynska writes an 

 account of the phytoplankton of the Javan lakes, including the Sawa. 



* Bull. Soc. Koy. Bot. Belg., xlix. (1912) pp. 126-32 (2 figs.) 



t Niiov. Notar., xxiv. (1913) pp. 23-36. 



t Bol. Soc. Brot. Coimbra, xxvi. (1911-12) pp. 5-84, 190-290. Published also 

 by Coimbra Univ., 1911, pp. 38-113 (5 pis.). See also Nuov. Notar., xxiv. (1913) 

 p. 49. 



§ Verb. Nat. Hist. Med. Verein. Heidelberg, n.f. xi. (1912) pp. 369-451 (1 pi.). 

 II Bull. Int. Acad. Sci. Cracovie, 1912, pp. 649-709 (4 pis. and figs.). 



