330 Bacteriologie. - Lichenes. - Bryophyten. - Pteridophyten. 



vermögen sie doch nicht mehr eine normale Säuerung der Milch 

 zu bewirken, denn ihre Säuerungs- wie ihre Vermehrungskraft ist 

 erheblich geschwächt. Die Vermehrungskraft erholt sich erst in 

 mehrerer Tage alten Milch infolge der Tätigkeit der peptonisierenden 

 Arten. Die Säuerungskraft erholt sich in derselben Zeit in bedeutend 

 geringerem Masse. Die sämtlichen sehr ausgedehnten Versuche 

 wurden mit Milch aus einem einzigen Betriebe gemacht, sie geben 

 daher auch ein Bild von der Zusammensetzung der Flora einer und 

 derselben Milch innerhalb längerer Zeit. Boas (Weihenstephan). 



WheMon, J. A. and W, G. Travis. The Lichens of South 

 Lancashire. (Journ. Linn. Soc. XLTII. p. 87—136. 1915.) 



The authors have studied carefully the lichens occurring in 

 South Lancashire, with a view to demonstrating the deleterious 

 effects on the flora of atmospheric pollution. A number of common 

 species do not exist there at the present da5% and whole genera of 

 corticole species are absent, as üsnea^ Ramalina, Graphis, etc., the 

 corticole species being those which suffer most. Other species re- 

 corded are so poorly developed that determination is difficult, and 

 the number of individuals is often scanty. From the few old records 

 which exist an effort is made to form an idea of what the lichen- 

 flora has been in the past, and it is hoped that when the bad con- 

 ditions at present prevailing have been abated, the present list will 

 provide an instructive comparison with the future flora. A complete 

 list of records is appended, and references to previous literature. 



E. M. Wakefield (Kew). 



Brotherus, V, F. et S. Okamura. Ishibaea, novum Brachy- 

 theciacearum genus ex Japonia. (Botanical Magazine. 

 Tokyo. XXIX. p. 186—188. PI. VIII. 1915.) 



The authors describe and illustrate a new genus with one new 

 species, belonging to the tribe of the Brachytheciaceae. It Stands 

 near Honialotheciiim but the flowers are smaller in all parts, the 

 leaves are not plicated and the structure of the peristome is widely 

 different. The new genus occurs in Japan: Sironma-jiri, Sakai- 

 mura, Shimotakai-gun , all in the province of Sinano. 



Jongmans. 



Hayata, B., Can Prosaptia properly be placed under Da- 

 vallia? ie. is it really distinct from Polvpodium? (Botanical Maga- 

 zine. Tokyo. XXIX. p. 161-168. 1915.) " 



The author concludes from his observations on Prosaptia, Da- 

 vallia and especially on his new species Polypodium urceolare, which 

 he described in Icones Plantarum Formosanarum, Vol. V, p. 324, 

 and several other species of Polypodiiirn , that Prosaptia should be 

 taken into Polypodium. For convenience sake it can be retained 

 as a subgenus of the latter, as is the case with Cryptosorus. Further, 

 Prosaptia being phylogenetically quite different from DavaUia, it 

 should be kept quite distinct from the latter genus. Jongmans. 



Watts, W. W., Some Notes on 5/^cAwz»« ca/)e?«s^ (L.) Schlecht. 

 (with description of var. Gregsoni, var. nov.). (Journ. and 



