ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 203 



and Donegal, the lakes of the Snowdon range, and the extreme north- 

 west of Scotland. 



A special section of the paper is devoted to the plankton-algse of 

 Lough Neagh. The authors describe the method of collecting and 

 remark on the presence or absence of certain forms. Many plants 

 which have been exclusively found in the fresh-water plankton-flora of 

 the Continent are here recorded from Lough Neagh. A tabulated list 

 is given of the plankton species found in Lough Neagh in May 1900 

 and July 1901, together with records from the upper River Bann and 

 from Lough Beg. Three plates containing 98 figures complete this 

 paper. 



Scottish Algse.* — E. A. L. Batters' recently published Catalogue 

 of the British Marine Alga is the source from which, in an unsigned 

 note, a list has been drawn up of all those algte that are recorded as 

 occurring on the coast of Scotland. 



Javan Algae. "j" — R. Gutwinski gives an account of the alga? collected 

 by Raciborski in 1899 in Java. The Desmideae gathered in Sitoe 

 Tjibenong pr. Bogor are particularly rich in species and forms. In all, 

 170 species of algae are enumerated, raising the algal flora of Java to 

 918 species, and that of the Dutch Indies to 1774 species. To the 

 Javan flora the actual additions are 7 genera, 108 species, 14 varieties, 

 and 2 forms. Five plates with 79 figures are supplied ; and 15 new 

 species, 21 new varieties, and several new forms are described. 



Fossil Algae.:}: — D. White describes two fossil specimens from the 

 Eurypterid beds at Kokomo, Indiana, and makes of them two new species 

 of the genus Buthotrephis. They are of marine origin ; and from their 

 form they might be sponges or algae ; but are referred to the latter 

 group as they contain no sponge-spicules. It is certain that they closely 

 resemble Codium tomentosum in outward appearance. 



Action of Salt Water on certain Fresh-water Algae.§ — J. Comere 

 has experimented on certain species of GEdogoniwn, Spiroggra, Vaucheria, 

 and Cladophora, with a view to determining what strength of saline 

 solution can be successfully withstood by them under cultivation. The 

 plants are grown in distilled water, to which is added a certain propor- 

 tion of a nutritive solution. Artificial sea-water is then prepared and 

 added by drops to the above culture-medium. Fertile specimens quickly 

 succumb to these experiments, and it is necessary to work with young 

 sterile and vigorous plants. Certain species of CEdogonvum and Clado- 

 phora are able to bear as much as 35 grm. of marine salts to the litre of 

 water, while Vaucheria sessilis was seen to grow in water containing 

 20 grm. of marine salts to the litre. The results varied with the different 

 species of Spirogyra. JS. catenccformis and ;S'. rarians flourished in a 

 solution containing 18-20 grm. to the litre, while S.jugalis and S. orbi- 

 cidaris cannot bear more than 15 grm. to the litre. The figures vary 

 according to circumstances, however, and must not be regarded as 



* Ann. Scottish Nat. Hist., 1903, pp. 55-8. 



t Bull. Internat. Acad. Sci. Cracovie, 1902, pp. 575-617 (5 double pis.). 



I Proc. U.S. Nat. Mus., xxiv. (1902) pp. 265-70 (3 pis.). 



§ Nuova Notarisia, xiv. (1903) pp. 18-21. 



