ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 193 



G.P.Clinton* has also devoted atteution to the fungus on chestnuts. 

 He gives an historical sketch of the various names applied to it by 

 Schweinitz and others. Clinton refers the chestnut blight to E. gyrosa 

 var. paraHHra., a broadly oval-spored variety, the species itself having 

 narrow spores. 



J. W. Roberts f has determined a new fungus on apple trees as Pho- 

 mopsis Mali. It causes a canker disease on the foliage and also occa- 

 sionally on the foliage and fruit. 



A new disease of tea is reported by S Ito and K. Sawada % in Japan. 

 It is due to Exoha^idium retkidatum sp.n., which attacks the leaves. 

 The first appearance is a small pale-yellow blotch on the surface of the 

 leaf, irregular in shape and increasing gradually till sometimes the whole 

 surface of the leaf is occupied by the fungus. The leaves are attacked 

 when they are very young, and much damage has been caused. 



M. Turconi and L. Maffei § describe two fungal attacks of Sovhora 

 japonica in the botanical gardens at Pavia. The first, due to Macro- 

 spormm 8op)horm sp. n., causes rounded blotches on the leaf, which are 

 somewhat light coloured on the upper surface, but almost black l^eneath 

 with the numerous spores of the fungus. The second disease, a white 

 dry-rot of the branches, is caused by a Fusarium, which in this case acts 

 as a true parasite. It grows in longitudinal stripes on the branches, ex- 

 tending up to 15 cm. in length and 1 cm. in width. The Fusarium 

 forms pink cushions of conidiophores, the summer form of the disease. 

 The winter form is GibbereJla Briosiana sp. n., which develops in the 

 following spring on the dead branches. 



E. Molz and 0. Morgen thaler || have studied a disease of carnation - 

 blooms that they have reason to believe has been introduced from 

 America. It is due to a species of Sporotrichum that is always ac- 

 companied by a mite determined as PecUculoides dianthophUus sp. n. 

 The fungus has been identified as S. Pose found in 1902 for the first 

 time on Poa pratensis, where it is accompanied by a mite Pedicidoides 

 graminum, in all probability identical with the one newly described on 

 the carnations. 



Sporotrichum Pose is so far unknown in Germany. The mite and 

 the fungus are mutually helpful, the mite aiding in the dispersal of the 

 fungus while feeding on the spores. The fungus converts the flowers 

 into a decaying damp mass. The development of the mite is described. 

 A Botrytis disease also attacked the injured l)looms, Init it was not the 

 original cause of the trouble. 



' A disease of vine If due to Valsa Vitis has been studied Ijy H. C. 

 Schellenberg. The most frequent form of the fungus met with is the 

 pycnidial stage, Cytospora Vitis, which marks the l^ranches with little 

 black points, each one the seat of a pycnidium ; a description of the 



* Phytopath., ii. (1912) pp. 265-9. 



t Phytopath., ii. (1912) pp. 263-4. 



X Bot. Mag., xxvi. No. 308 (Tokyo, 1912) pp. 237-41 (figs.). See also Bull. Bur. 

 Agric. Intell. Rome, iii. (1912) p. 2534. 



§ Rend. Reale Accad. Lincei, CI. Sci. Fis. Mat. Nat., xxi. (Roma, 1912) pp. 

 246-9. See also Bull. Bur. Agric. Intell. Rome, iii. (1912) pp. 2534-5. 



'i Ber. Deutsch. Bot. GeselL, ix. (1912) pp. 654-62 (1 pi.). 



1 Ber. Deutsch. Bot. GeselL, ix. (1912) pp. 586-93 (1 pi.). 



