ZOOLOGY AND BOTANV, MICROSCOPY, ETC. 85 



(Uspersa, Parmeliopsis hyperopta and LGcanora spec, which live on Endo- 

 carpon miniatum a very common lichen in the neighbourhood of 

 Stuttgart. He found that the host lichen was very seriously aifected 

 and in some cases quite destroyed by the parasite. The gonidia and 

 perithecia suffer first, and finally the hyphse. The parasitic lichen is 

 also affected by its halwtat, the gonidia and apothecia are larger, and 

 the gonidial layer occupies half of the whole thallus. 



Claudel, H. & S., & J. Harmand — Lichenes Gallici. (French lichens.) 

 [A list of 50 species, Nos. 30L-50 including a great variety of plants] 



Docellus Vogesorum, 1905, fasc. vii. See also 

 Bot. Centmlbl., cii. (1906) p. 452. 



Zahlbruckner, a. — Schedae ad " Kryptogamas exsiccatas" editae a Museo- 

 Palatine Vindobonensi, Centuria xii.-xiii. 



[A list of lichens is included.] 



Ann. Natnrhist. Hofmuseums Wien, xx. [1905] 1905, pp. 1-48. 

 See also Bot. Ccntralbl., cii. (190G) pp. 498-504. 



Mycetozoa. 



Myxomycetes of Switzerland.* — H. Schinz has provided the first 

 publication of these organisms for Switzerland. He enumerates 106 

 species collected over the whole of the country, and many of them found 

 over and over again. The author records 25 species that were found 

 at altitudes of over 1600 metres. Keys to the genera and species 

 have been provided by A. Lister, and these include foreign forms also, 

 as later they may be found in Switzerland. 



Harmful Myxomycete.j — Thorild Wulff records the various cases 

 in which Myxomycetes have been known to do damage to plants, and 

 he then proceeds to describe an unusually large development of Physarum 

 cinereum on a grass meadow in Sweden. Large stretches were overspread 

 by the Physarum and owing to the sporocyst formation took on a grey 

 colour. The grass was completely smothered by the large mass of the 

 myxomycete. The meadow in question was formed into experimental 

 culture plots, and it was found that the myxomycete spread most widely 

 on the unmanured portions. A detailed description of the organism is 

 given by the author. 



Pries, Rob. E. — Myxomycetenfloran i de jamtlandska fjalltrakterna. (A list of 

 Swedish Myxomycetes.) Arkiv Bot., vi. No. 7 (1906) 9 pp. 



Schizophyta. 

 Schizomycetes. 



Formation of Slime or Gum by Rhizohium leguminosarum.| 



R. Greig Smith believes that the direct fixation of nitrogen may not be 

 the function of Rhizobium, but nitrogen is fixed by the plant and the 

 microbe assists in the process. Vibrio denitrificans converts the combined 



* Mitth. Naturwiss. Ges. Winterthur., vi. (1906) 129 pp., 45 figs. See also Bot. 

 Centralbl., cii. (1906) p. 530. 



t Zeitschr. Pflanzenkr., xvi. (1906) pp. 202-6 (1 pi.). 

 X Proc. Lin. Soc. N.S.W., 1908, p. 264. 



