ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 795 



Nidularia piriformis. He describes the developments of the fruiting 

 body with its peridiola. He found two nuclei in all tbe cells of the 

 hypnse, fusion taking place in the young basidium, the fused nucleus 

 being very much larger. He describes the subsequent nuclear divisions 

 resulting in the formation of four daughter-nuclei which pass up into 

 the newly formed spores, and there each one divides again so that the 

 spore is always bi-nucleate. It is noteworthy that the nucleus had 

 already begun to divide before it passed through the narrow sterignia 

 into the spore. Comparison is made with nuclear divisions and spore- 

 formation in other fungi. 



Mycological Notes.* — In a series of letters, C. G. Lloyd has pub- 

 lished lists of specimens sent to him from many localities. He also gives 

 an account of his work on the Polyporoid types of Leveille at Leiden, 

 and of the Junghuhn types in the same museum. He found there 

 coloured drawings of many tropical Javanese fungi, which were meant 

 for publication but never made use of. 



Fungus parasitic on Citrus White Fly.f -The fungus, as described 

 by H. S. Fawcett, forms on the under side of an orange leaf in larvae of 

 the white fly a chocolate-brown stroma, and was originally called by 

 Webber the "brown fungus." It has been recently indentified as a 

 form of sEgerita, the sporodochia developing on the brown stromata. 

 Larva? were successfully infected by the fungus. 



Leaf-spots of Currant.! — Ernst Voges has made inoculation 

 cultures of a Mycosphserella sp., the fungus of currant leaves, and has 

 obtained the pyenidial form Phyllosticta. The latter was identical with 

 P. Grossularise on gooseberry leaves, and with P. ruborum and P. rubicola 

 on raspberry leaves. The leaf-spots formed varied considerably in 

 appearance and their diagnostic value was very small. It was also 

 observed that several parasitic species attacked the same leaf, the weak- 

 ness induced by one parasite having encouraged the development of others. 



Physiology and Pathology of Hevea brasiliensis.§ — T. Petch has 

 published a handbook for the use of planters on the management of 

 Hevea, the principal rubber tree. The latter part of the book deals with 

 the diseases to which it is subject. In Chapter IX. are described the 

 leaf-diseases due to the fungi Helminthosporium Hevese and Glceosporium 

 Hevese, both of them discovered and described by the author. Root 

 diseases are discussed in Chapter X., Hymenorhsetse noxia being the 

 commonest, though Forties senitostus is the most deadly. The fruit and 

 stem suffer from Phytophthora Faberi. Pink disease of stem is due to 

 CorUcium salmonicolor and die back to Botryodiplodiu Theobromse. 

 Moulds grow on prepared rubber, but as they do Dot attack the caout- 

 chouc they are harmless. Other fungi are recorded and described that 

 are probably saprophytic. 



* Letters, 27-29 (1910) ; 30-7 (1911). 



t Science, n.s. xxxi. (1910) pp. 912-13. 



% Centralbl. Bakt., xxx. (1911) pp. 573-9 (5 figs.). 



§ London : Dulau and Co., Sobo Square (1911) 2G8 pp. (16 pis., 1 col.). 



