ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 225 



Pyrenomycete, CeratostomeUa pilif&ra. He records a new species of 

 Coniothyrium, which he found on damp boards, and describes it as 

 C. domesticum. Many kinds of fungi make their appearance in damp 

 cellars, etc. ; but he has only taken into account those that have wood- 

 destroying properties. 



Notes on German Fungi.* — P. Hennings describes a variety of 

 Boletus granulatus, the pores of which were covered with small crystal- 

 like cushions, white, then brown. These were composed of small tufts 

 •of clavate paraphyses. A specimen of Colhjbia platyphylla was collected 

 with a very long rooting rhizomorph. The young tips of the mycelium 

 were faintly phosphorescent. He describes also an abnormal form of 

 Tricholoma conglobatum and a peculiar species of Corlinarius. 



Seed-fungus of Lolium temulentum.f — E. M. Freeman has ex- 

 amined this fungus. He finds that it spreads outside the aleurone 

 sheath — through the scutellmn up to the vegetative apex of the embryo. 

 It develops anew with the seed and is found in the stalk, at the base of 

 the leaf, and in the flower. No spore-formation could be detected. 

 Probably there is a condition of symbiosis between the parasite and the 

 host, as the seed is not injured by the fungus. 



Disease of Coco-Palm.f— M. Hollrung examined diseased material 

 from New Guinea, where great damage had been done to the Palms. 

 Much of the injury was found by him to be due to insects, but there 

 were present the pycnidia of a fungus which could not be determined. 

 He found also Pestalozzia palmarum, but the author is rather of the 

 opinion that these fungi were saprophytes, and had not caused the 

 •disease. 



Biological Test for the Presence of ArsenicJ— A. Maassen has 

 worked over Gosio's results on this important subject. He found that 

 not only Penicillium brevicaule but other moulds and also bacteria 

 •absorb soluble arsenic, selenium, tellurium, etc., giving out at the same 

 time a characteristic odour. The author explains the chemical reaction 

 that takes place. He discusses also the reducing and other properties 

 of the cell. He entirely confirms the value of Gosio's discovery of the 

 biological test for the detection of arsenic. 



Morphological Researches.! — W. Magnus has directed his attention 

 to the capability of fungi to recover from injury. Renewal of tissue is 

 always more or less retarded by the reproductive activity of the plant, 

 •but there is a strong tendency to renew the original form, though in 

 many cases hymenial gills may be replaced by teeth, pores, or a reticu- 

 late form. This is due to mechanical conditions of growth. 



Harmful Fungi.^T — Julius von Istvanfh* describes the damage done 

 'by Ithyphallus impudicus to the vines in Hungary on a loose sandy soil. 



• Hedwigia, xlii. (1903) pp. 2H-17 (1 pi. and 2 figs.). 



t Phil. Trans. Roy. Soc, ser. B, cxcvi. (1903) pp. 1-27 (3 pi.). 



J Zeitsehr. f. trop. Landwirtsch., vii. (1903) p 136. See also Ann. Mycol., i. 

 K'1903) p. 559. 



§ Arbeit. Kaiserl. Gesundheits., xviii. (1902) pp. 475-S9. See aleo Ann. Mycol., 

 i. (ia03) pp. 569-70. 



II Ber. Deut-ch. Bot. Ges.,xxi. (1903) pp. 129-31. See also Ann. Mycol., i. (1903) 

 P- 665. ^ Zeitsehr. Magyar, bot. Lapok., ii. (.1903) pp. 133-4. 



