ZOOLOGY A.ND BOTANY. MICROSCOPY. ETC, 549 



infected Arenaria later iff ora, etc. ; MeJampsom arrtka infected Abies 

 balsamea, and a MehDupsura on Poptdas graiididentata formed a Caeoma 

 on Tsuga canadensis. 



C. R. Orton * has made a comparative study of Uromyces and Fuccinia. 

 He gives an historical account of the former genus, and then proceeds 

 to give examples of spore production in a number of co- related forms in 

 both genera. In the plates the spores are contrasted. 



British Mycology. — Dr. A. Boyd t publishes biological notes on 

 some microfungi. Podosphaera inyrtilli/ia has only twice been recorded 

 in Scotland : the writer has found it in Midlothian and again in Dum- 

 friesshire on l)lackberrv bushes. He states that the growtli of the host 

 was not affected by the presence of the parasite. Cronartium ribicoluia 

 he considers a fairly recent importation into the country, but it now 

 threatens to become very destructive to Weymouth pines. The teleutu- 

 spore form on currant bushes was locally abundant in Perthshire and 

 also in Dumfriesshire. 



M. Wilson X describes a new species of Pyrenochaeta which was 

 discovered on holly leaves from Wimbledon Common. The genus, one 

 of the Fungi imperfecti, is characterized by the presence of bristle-like 

 hairs on the perithecium. 



Plant-diseases. — Hollrung§ has recently issued his yearly volume on 

 the various diseases of plants. The present issue treats of those observed 

 during the year I'JIO. All kinds of plant troubles are dealt with, but a 

 large part of the l)Ook is occupied with parasitic fungi. They are dis- 

 cussed under the different families of plants attacked. The Ijook is. 

 provided with a bibliography and au index. 



A number of important papers have appeared in the American 

 Journal of Phytopathology. H. S. Fawcett || has proved that stem and 

 root-rot of Citrus trees is due to Phomopsis Citri sp. n. Cultures were 

 made on the fruits which speedily became covered with the pycnidia of 

 the fungus. 



Neil E. Stevens 1[ records the destruction of cut timber wrought by 

 Polystictus versicolor. 



L. L. Harter** and Ethel C. Field give details of the ixxiign^ Phonia 

 batatae, which destroys the sweet potato. They found the perfect fruit 

 form, a species of Diaporthe. 



S. M. McMurran ft traces a rot of Pomegranates to the action of 

 Sterigtnatocystis castanea . 



B. Paque J| reports on the progress of the oak mildew. He made a 

 large series of cultures, but was unable to obtain the perithecial form. 



* Mycologia, iv. (1912) pp. 194-204 (2 pis.). 



t Glasgow Naturalist, iv. (1912) pp. 85-8. 



X Scott. Bot. Rev., i. (1912) p. 161. 



§ Jahr. Pflanzenkr., xiii. (1912) pp. viii and 469. 



II Phyto[ athology, ii. (1912) pp. 110-13 (2 pis.). 



t Phytopathology, ii. (1912) pp. 114-15. 

 *• Phytopathology, ii. (1912) pp. 121-4 (2 figs.), 

 tt Phytopathology, ii. (1912), pp. 125-6. 

 Xi Bull. Soc. Roy. Bot. Belg., xlviii. (1911) pp. 22-6. 



