1J84 SUMMARY OF GUERENT RESEARCHES RELATING TO 



Radulum ; a cream-coloured Radulum was growing near to Merulvm 

 tremellosus, with which it was proved to be identical. A genus, 

 Platijghea, new to Britain was found ; the species P. efusa resembles 

 Corticiuni or Selacina in appearance, but has a transversely septate 

 basidium. A new fungus, Hypochnus roseo-giseus, is abundant on old 

 pine-roots. A. L. S. 



Further Notes on Colus Gardneri (Berk.) Fischer.— T. Fetch 

 (Trans. Brit. Mycol. Soc, 1919, 6, 121-32, 1 pi.). This fungus was 

 first described by Berkeley as a species of Lysurus. It was removed to 

 Coins by Fischer because the vertical lobes or " arms " are united at the 

 top. There has been much discussion as to its true position, but Fetch 

 has had ample opportunity of seeing fresh specimens in Ceylon, and he 

 finds that it differs both from Lysurus and from Colus in its glebiferous 

 layer, which extends laterally almost completely round the arm, but is 

 interrupted by a deep narrow furrow on the outer side ; it consists of 

 numerous plicate processes and plates perpendicular to the arm, closely 

 packed together and presenting a granular outer surface. On this 

 account Fetch has established a new genus, Pharus. The fungus has 

 been found only in Ceylon. A. L. S. 



Studies on the Biology and Culture of the Higher Fungi.— 

 O. BOYER (Mem. Soc. Sci. Phys. Nat. Bordeaux, 1918, 11, 233-344, 

 4 pls:, 20 figs.). The author deals with every aspect of the culture of 

 the higher fungi. His method was to work with " cuttings " rather than 

 with spores. Some forms, such as the mushroom, responded excellently ; 

 others, 3Iorchella for instance, refused to grow by " cuttings," though 

 the spores germinated freely. In no case was a sporophore obtained in 

 this species, which caused Boyer to conclude that some parasitism or 

 association with other organic life was often necessary for full develop- 

 ment. He also comments on the changes in size and coloration 

 obtained which render these characters of less importance in classification. 



A. L. S. 



Notes on some Saprophytic Species of Fungi associated with 

 Diseased Potato Plants and Tubers. — G. H. Pethybridge (Trans. 

 Brit. Mycol. Soc, 1919, 6, 104-20, 2 pis.). The author has made a 

 prolonged cultural study of these fungi during his investigations of 

 potato-disease in Ireland. He cultivated the spores of a Nectria that he 

 found on old potatoes, and from these he developed the wdl-known 

 Acrostalagmus cinnaharinus (re-named Verticillium by Reinke and 

 Berthold). An attempt was made to develop the Nectria perithecia from 

 the conidial form, but that was unsuccessful. The Nectria has been 

 named N. inverta sp. n. Fethybridge also describes Colletotrichum 

 tah'ficum sp. n., which developed from sclerotia-like bodies. Hijpomyces 

 Solani, also a Saprophyte, was induced to form conidia ; these are four- 

 celled and somewhat similar to Fusarium conidia, but not identical with 

 any Fusarium found on the potato hitherto. Two new species of 

 Verticillium, V. nubilum and V. nigrescens, were found on diseased 

 tubers, somewhat like F. albo-atrum, but whereas the mycelium of the 



