ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 585 



the variations were not constant enough to be specific. The fila- 

 ments are rigid, branched, and septate, and have a somewhat rougher 

 membrane. By means of cultures he was able to follow the spore 

 development — elongate, simple conidia borne in clusters at the tips of 

 the fertile branches, and recalling the conidiophores of Cladosporium 

 and Dendryphium. Spore production is rather rare. 



Gueguen cultivated the fungus on a large number of nutritive media, 

 the details of which are given, and he reproduced in them the differences 

 in colour, structure, etc., that had been noted in the various specimens 

 examined. He classifies Rhacodium in the group Deniatieas of the 

 Hyphomycetes. Perithecia and pycnidia that have been found in 

 conjunction with Rhacodium cellare belong to some other fungus. 



New Genus of Hyphomycetes.* — Paul Vuillemin found this new 

 fungus on a growth of Aspergillus ; it formed a star-like structure, 

 hyaline at the centre, brown towards the rays owing to the presence of 

 brown spores. These are produced at the ends of the fertile filaments. 

 He calls the new fungus Hemispora stellata g. et sp. n. 



Uredinese. — 0. L. Shear t considers that he has good evidence from 

 observation and from the results of open-air inoculation, for assuming a 

 connection between Peridermium cerebrum on Pinus virginiana and 

 Cronartium quercuum. He holds also that the Japanese fungus Peri- 

 dermium giganteum is identical with P. cerebrum, the latter name having 

 many years' precedence. Both forms of the fungus occur on several 

 host species. 



In his " Rust Notes for 1905," J. M. Bates? chronicles the finding 

 of various Uredinea? in their several stages. He found an JEcidium on 

 Oenothera biennis, and its uredo-form on a Car ex close at hand, which 

 have been proved to be new. 



H. L. Bolley and F. J. Pritchard § publish an account of wheat rust. 

 They give notes as to resistant varieties, and recommend attention to 

 cleanness of seed, land free from weeds, with the destruction of wild 

 grasses and barberry shrubs to keep the crops free from contamination. 



Notes on Mycenastrum Corium. — As there has been much diver- 

 gence of opinion as to the appearance of the mature spore in this fungus, 

 L. Rolland || has examined authentic specimens with great care. The 

 spores are at first colourless and smooth, and borne at the end of short 

 sterigmata. As they mature, they become an olive-purple colour, and 

 are covered with small colourless warts. A small projection from the 

 spore indicates the place of attachment to the sterigma. Rolland has 

 also found the sterigmata of Bovista spores. He contrasts the tissues of 

 the two genera. 



Fungi in Cheese Ripening.f — Chas. Thorn has studied the physio- 

 logical effects of such fungi as Penicillium Camemberti, P. Roqueforti, 



* Bull. Soc. Mycol. France, xxii. (1906) pp. 125-9 (1 pi.). 



t Journ. Mycol., xii. (1906) pp. 89-92. 1 Tom. cit., pp. 45-7. 



§ North Dakota Agric. Exper. Stat., Bull. No. 63, 1906 (30 figs.)- See also Bot. 

 Centralbl., cii. (1906) p. 38. 



|| Bull. Soc. Mvcol. France, xxii. (1906) pp. 109-15 (1 pi.). 



^ U.S. Dep. Agric. Bur. Animal Ind., Bull. No 82, 1906 (3 figs.). See also Bot. 

 Centralbl. cii. (1906) p. 40. 



Oct. 17th, 1906 . 2 Q 



