ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 4L9 



the algal constituents of each lake, and its general character, he discusses 

 the subject from the following points of view : comparison of the topo- 

 graphical and physical conditions of the Faulhorn range ; biological 

 comparison of the flora of the basins examined ; the seasonal dimor- 

 phism in the lakes of the high Alps, etc. 



Plankton of River Po. * — C. Padovani publishes a preliminary- 

 contribution to the fluvial plankton-flora of the River Po. The material 

 was collected in the lower reaches of that river near Ferrara between 

 April and November in 1908-10, and contains twelve forms of algaB. 

 The quicker currents contain very few organisms, principally diatoms, 

 Asterionella and Fragilaria ; the feeble currents and backwaters are 

 considera])ly richer in organisms, principally Rotifers. 



Adriatic Phytoplankton.f — B. Schroder gives an account of the 

 Adriatic phytoplankton collected near the coasts of Istria and Dalmatia, 

 and treats the subject under the fallowing headings:—!. Horizontal 

 and vertical distribution. 2. Phytoplankton of brackisii water. 3. 

 Boreal types in the Adriatic phytoplankton. 4. Some forms of floating 

 apparatus. 5. Epiplankton. 6. Diary of collections. Sundry new 

 species are described. 



Fresh-water Algae. | — G. S. West continues his algological notes. 

 5. He describes the diatomaceous constituents of a sample of earth from 

 Rhodesia, taken from a fresh-water deposit of recent origin. (5. He 

 deals with some African fresh-water algaj, fifteen in numl)er. adding 

 critical notes and figures of some of them. 7. Two small collections of 

 Queensland algie, sent from Brace Desert and from Xorth Queensland, 

 contain species of considerable interest. 8. A note on Selenadrum 

 acuminatum Lagerh. 9. Description of a new desmid from Westmorland. 



Antarctic Fresh-water Algae.§ — L. Gain publishes a note on the 

 fresh-water algaj of the South American Antarctic region collected 

 during the second French Antarctic Expedition on the ' Pourqaoi-Pas.' 

 There were twelve Schizophycese and eleven Chlorophyceje, and five of 

 the species are new to science. 



Fresh-water Algae of New Guinea. || — C.Bernard gives an account 

 of the fresh-water alga3 collected by D. Versteeg during Lorentz's first 

 expedition to New Guinea. He figures and describes or annotates 

 twenty-three species and varieties, among which two species and two 

 varieties are new to science. 



Cyanophycese of German Colonies. T — F. Esmarch writes on the 

 Cyanophyceje of the German colonies in East and South-west Africa, 

 Kiautschou, Samoa. He describes how the earthy specimens were col- 

 lected and cultivated in Petri glasses and analysed. Thirty-three species 

 are enumerated — twenty-nine being from East Africa, ten from South- 



* Zool. Anzeig., xxxvii. (1911) pp. 99-104. 



+ SB. k. Akad. Wiss. Wien, cxx. (1911) pp. 601-57 (figs.). 



X Journ. cf Bot., 1. (1912) pp. 79-89 (figs.). 



§ Bull Mus. Hist. Nat. Paris, v. (1911) pp. 871-6. 



i] Nova Guinea : Resultats de I'Exped. Sci. neerlandaise, viii. (Bot.) livr. 2, 

 pp. 253-70 (2 pis.). 



^ Jahrb. Hamburg. Wiss. Anst., xxviii. (1911) '^^<-' Beih. Arb. Bot. Staatsinst, 

 pp. 63 -82. 



