242 . Palaeontologie. — Algae. — Fungi, Myxomyceten, etc. 



Arber, E. A. N., On the Upper Carboniferous Rocks of 

 West Devon and North Cornwall. (Quart. Journ. Geol. Soc, 

 Vol. LXIII. p. 1—27, with 3 text-figures. 1907.) 



The interest of this paper is chiefly geological, it being shown 

 that the greater part of the Culm Measures of Devonshire etc., 

 are of Upper Carboniferous age (Middle Goal Measures), and thus 

 are not equivalent to the Culm deposits of the continent. A complete 

 account is given of the fossil fiora, preserv^ed as impressions, and 

 the occurrence of badly preserved plant-petrefactions recorded. 



Arber (Cambridge). 



Salmon, E. S., On a fungus disease of the Cherry laurel 

 {Prunus Laiirocerasus). (Journ. Roy. Hort. Soc. Vol. XXXI. Dec. 

 1906. p. 142—146.) 



The appearance in England of a mildew, known as Oidiimi 

 Passerinii, Bert, is of interest in that it has led to the establishment 

 by Salmon of its identity with Sphaerotheca pannosa. The pannose 

 patches of mycelium so characteristic of this latter are present and 

 microscopically the mycelium and conidia are identical. 



The attacks here recorded, as also those previously known, are 

 of a transient nature, and do not recur the following season; the 

 author suggests the fungus is not fully adapted to living on the 

 plant it is attacking, and this view is supported by the fact that the 

 host plant produces a periderm under the tissues attacked by the 

 fungus. A. D. Cotton (Kew). 



Smith, A. L., Recent Advances in the Study of Fungi. 

 (Science Progress London. NO. 3. Jan. 1907. p. 530—536.) 



Science Progress, a Journal devoted to summaries of current 

 scientific investigation, contains in its third number a resume of 

 recent discoveries in mycology. 



The work of Blackman, Blakeslee, Harper, Salmon, Ward 

 and many others is dealt with and Condensed for the benefit of 

 those who lack opportunity for detailed reading. The researches 

 which are here summarized have been already individually noticed 

 in the Centralblatt, A. D. Cotton' (Kew). 



Bubäk, Fr., Infektionsversuche mit einigen Uredineen. 

 IV. Bericht. 1906. (Centralbl. f. Bakteriologie etc. IL Abt. XVIII. 



p. 74—78. 1907.) 



Von zwei verschiedenen Seiten ist die Entwicklungsgeschichte 

 des Aecidium Plantaginis Ces. aufgedeckt worden. Vor kurzem hat 

 W. Tranzschel nachgewiesen, dass dieses Aecidium zu Pucchna 

 Cynodontis Derm. gehört, und nun macht der Verf. hier Mitteilung 

 über Versuche, die zu demselben Ergebnis geführt haben und die 

 Angaben Tranzschels noch ergänzen. Die Aussaat der Sporidien 

 ergab eine reichliche Infektion nur auf Plantago lanceolata^ sie war 

 dagegen erfolglos auf Plantago major, media, Cynops und Psyllium. 

 Es wird noch darauf hingewiesen, dass das amerikanische Aecidium 

 auf Plantago von dem europäischen verschieden ist, da Puccinia 

 Cynodontis in Amerika fehlt und ausserdem für das Aecidium auf 

 Plantago Regulii die Zugehörigkeit zu Uromyces Aristidae Ell. et 

 Ev. nachgewiesen ist. 



