470 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Plankton of some Irish Lakes.* — W. and Gr. S. West continue the 

 account begun in 1902 of the plankton collected by them from Irish 

 lakes. The previous paper treated of Lough Neagh and Lough Beg, 

 while the present one deals with plankton from the most important lakes 

 in the west and south-west of Ireland. The flora of these lakes is com- 

 pared with that previously recorded from Lough Neagh and Longh Beg. 

 Some of the pelagic organisms had never before been observed in the 

 British Isles. The authors divide their subject into two parts, one 

 being a detailed account of the plankton of the loughs investigated, and 

 the other a systematic account of the more important alga? of the plank- 

 ton. In the first part, sixteen of the loughs are described shortly, and 

 mention is made of any peculiarities exhibited by the plankton, with the 

 dominant forms contained therein. Special note is taken of the forms 

 of C&ratium liirundinella 0. F. Mull., the abundance and variation of 

 which is a striking feature of the fresh-water plankton of Great Britain 

 and Ireland. The diversity of form is greater in Ireland than in the 

 west of Scotland, or in the Orkneys and Shetlands ; indeed, it is not 

 uncommon to have two or even three distinct forms in one lake. 

 Figures are given of nine different forms. The second part of the 

 paper deals specifically with those alga? of the plankton deserving of 

 special mention, either for their abundance or rarity, or for some pecu- 

 liarity which had hitherto escaped observation. Five new species are 

 described, and three new varieties. Four quarto plates show photo- 

 micrographs of plankton, and two show figures of alga?. 



Cori, C. J. — TJeber die Meeresverschleimung im Golf von Triest im Sommer 1905. 



(On the sliminess of the sea in the Gulf of Triest in the summer of 1905.) 



Arch. Hydrobiol. u. Planktonk., i. (1906) No. 3. 

 Kylik, H. — Biologiska iakttagelser rdrande algfloran vid Svenska Vastkusten. 

 (Biological observations on the algal flora of the west coast of Sweden.) 



Botan. Notiser, (1906) pp. 125-37. 

 Macovei, G., et J. S crib an — Contributions a l'etude de la flore des lacs d'eau 

 douce de la Dobrogea. (Contributions to the study of the flora of the fresh- 

 water lakes of the Dobrogea.) Ann. Sci. Univ. Jassy, iii. (1906) pp. 239-43. 

 Migula, W. — Thome's Flora von Deutschland. V. Kryptogamen. (Flora of 

 Germany. Cryptogams.) 



[Diatomacese continued. Navicula — Mesotcenium.'] 



Gera : Zezschwitz, 1906, lief 27-9, pp. 257-352 (15 pis.) 

 St ad lee, E. — Ein kleiner Beitrag zur Kenntniss der Siisswasseralgen von 

 Dalmatien. (A small contribution to a knowledge of the fresh- water algae of 

 Dalmatia.) 



[The results of an examination of algal material, collected by Beck v. 

 Mannagetta in several places in Dalmatia. The author includes all 

 known records from that country.] 



SB. Nat. Wiss. Med. Ver. " Lotos;' Prag., xxv. (1905) pp. 236-44. 



Tanner, Fulle mann — Sur un nouvel organisme du Plancton du Schoenenbo- 

 densee. (On a new plankton organism of the Schonenbodensee.) 

 \_Rophidium Chodati Tanner.] 



Bull. Herb. Boissier, vi. (1906) pp. 156-8 (figs.) 



Zacharias, O. — Das Plankton als Gegenstand eines zeitgemassen biologischen 

 Schulunterrichts. (Plankton as a subject for modern biological instruction in 

 schools.) Arch. Hydrobiol. u. Planktonk., i. (1906) 98 pp., 17 figs. 



* Trans. Roy. Irish Acad., xxxiii. (1906) pp. 77-116 (6 pis.). 



