Woodhead: Plant Geography in Switzerland. 209 



that the mosses growing on these blocks have not been brought 

 with them from the Alps. 



Meylan (1898-1900, F. H., 60, 210), has written much on 

 the geographical distribution of mosses in the Jura. Amann 

 has ready for publication an elaborate work on the moss 

 flora of Switzerland, the introductory chapters of which will 

 deal with the geographical distribution of mosses on essentially 

 the same lines as adopted b}^ Christ for flowering plants. 



Von Tavel, (1893, F. H., 35) worked out in a particularly 

 interesting manner the connection between heteraecious Ured- 

 ineae and plant associations, shewing that the two hosts are 

 usually constituents of the same plant association. These re- 

 lations are worked out with still greater thoroughness by Fischer 

 in his Uredineae of Switzerland. This we may regard as leading 

 the way for much interesting work on the ecology of fungi. 



Lakes and the Study of Aquatic Vegetation. — Much 

 time has been spent on the investigations of Swiss lakes, and 

 numerous monographs, often of considerable extent have been 

 published. Complete monographs have already appeared for 

 the lakes of Geneva, Constance, Katsensee, Lac de Brett, 

 Liitzelsee, and the lakes of the whole Jura. All the large lakes 

 and many of the smaller ones have been studied to a greater 

 or less extent. Monographs on the Lake of Lucerne are now 

 being published, those dealing with the physical properties 

 of the lake, and the Fauna are completed and also a portion of 

 the Flora. The more important works in this direction are 

 by Forel (1874—, F. H., 16, 49, 53), Magnin (1892-4, F. H., 16). 

 Schnetzler (1885— F. H.. 60), Chodat (1895— F. H., 48, 49, 

 50, 53, 54), Pavesi (1889, F. H., 52), Overton (1887-9, F. H., 

 51), Hochreutiner (1896-7, F. H., 92), Pitard (1896-7, F. H., 

 47, 48, 49, 51), Brun (1881-4, F. H., 16,49), Heuscher (1891, 

 5, F. H., 16 and 17), Fuhrmann (1899, 1900, F. H., 17, 50), 

 kirchner (1896-9, F. H., 17), Schroter * (1895-7, F. H., 17, 45, 

 192), Zschokke,! also several papers by Schroter's pupils, e.g., 

 Amberg (1899-1900, F. H., 51), Waldvogel (1900, F. H., 17), 

 Lozeron,! and Bally, § the four latter workers, as well as 



* C. Schroter and Vogler, ' Variationsstatistische Unters. uber Fvagi- 

 laria crotonensis,etc.' Vierteljahrschrift d. naturf. Ges. Zurich, 1901. 



t F. Zschokke, ' Die Tierwelt der Hochgebirgseen.' Basel, 1900. 



+ H. Lozeron, ' La repartition verticale du Plancton dans le lac de 

 Ziirich.' Vierteljahrschrift d. naturf. Ges. Ziirich, 1902. 



§ W. Bally, ' Der obere Ziirichsee.' Archiv. f. Hydrobiologie III. 

 Stuttgart, 1907. 



1908 June I. 



