166 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Algae and Peridiniese from the Jura.* — J. Virieu.x adds to our 

 knowledge of the algae of the Jura region by a paper on the algae and 

 IVridinieae of Franche-Comte. lie records some interesting species and 

 describes some novelties. Most of the species recorded are figured 

 and accompanied by interesting critical notes. PeHdinium hi pes appears 

 to be the commonest species of the genus in the Jura. 



Flagellatae of Charkow.f — I). Swirenko writes on the Flagellatse 



of the town of Charkow. He records 75 species, of which 58 are 

 Euglenaceae. Euglena is represented by 19 species, of which one, 

 E. charhoivensis, is new. Five other new species are described and 

 figured. All are plankton organisms. 



Russian Phytoplankton.J — L. von Reinhard describes the phyto- 

 plankton of a lake 15 kilometres south-east of Smijow. It is 1-1*5 m. 

 deep, 5 km. long, 3 km. broad, and has neither in- nor outflow. Two 

 samples were collected by Stradomsky, which the author examined. 

 Among the algae predominate Gomphosphseria lacustris Chod. var. 

 compacta Lemm., Oocystis lacustris Chod., Gyclotella Meneghiniana 

 Ktitz., Pandorina, and Gonium. The plankton is of a tychoplanktonic 

 character. The diatoms which characterize larger lakes are wanting, 

 such as Fragilaria crotonensis Kitt., and Synedra delicatissima W. Sm. 

 There are many brackish-water forms, such as Gomphosphseria, Nodidaria 

 spumigena, Amphora paludosa, Nitzschia Brebissoni. There is no limno- 

 plankton. The floating flora of the lake consists mostly of halophil 

 species, to which also the brackish-water species belong. A new 

 Gosmarium, G. Alexenkovi, is described and figured. 



Two New Species of Characium. — F. Filarzky§ gives the Latin 

 diagnoses and figures of two new species of Characium previously 

 described by Hanko. They were found on the claws of a cray-fish 

 in a swamp near Poprad by Hanko, and named G. setosum Fil. and 

 C. saccatum Fil. The locality has since been destroyed by railway 

 works. 



A. Scherffel || discusses these two species, and their similarity to 

 G. gradlipes Lambert and G. cylindricum Lambert, both from North 

 America. He shows that though similar they are not identical, and 

 they form two similar parallel lines of descent, both consisting of 

 epiphytic forms. 



* Bull. Soc. Hist. Nat. Doubs, No. 27 (1912-13) 12 pp. (text-figs.). See also 

 Bot. Centralbl., cxxvi. (1914) p. 154. 



t Trav. Soc. Nat. Univ. Imp. Kbarkow, xlvi. (1913) pp. 67-90 (3 pis.). See also 

 Bot. Centralbl., cxxvi. (1914) p. 214. 



X Trav. Soc. Nat. Univ. Imp. Kbarkow, xlvi. (1913) pp. 97-114. See also Bot. 

 Centralbl., cxxvi. (1914) p. 213. 



§ Bot. Kozlemenyek, xiii. (1914) pp. 9-11 (fig.). 



|| Bot. Kozlemenyek, xiii. (1914) pp. 12-17. See also Bot. Centralbl., cxxvi. 

 (1914) p. 213. 



