Spore Formation in Rhacodium cellare Pers. 95 



fungus, thus remo\dng the fungus from the category of " MyceUa 

 stenha'' to the Dematiaceae. 



Some time ago Mr F. T. Brooks handed me a specimen of this 

 fimgus for cultural study, and the object of this note is to call 

 attention to Gueguen's important paper upon it and to confirm 

 his obsen'ations upon the process of spore formation. 



Spore production is readily observed in hanging-drop cultures 

 estabhshed from a fragment of mycehum. The conidiophores 

 are branched and bear oval conidia sometimes abstricted in 

 chains. These conidia are capable of germination. The conidio- 

 phores are somewhat like those of Cladosporium, but, as ^^ith 

 the vegetative mycelium of Rhacodium cellare, there is always 

 a tendency for the constituent parts of the conidiophores to 

 break asunder and to fonn independent propagative units. 

 Figures of the spores and conidiophores are given in Gueguen's 

 paper. 



A LIST OF FUNGI &c. MAINTAINED 



IN THE NATIONAL COLLECTION OF 



TYPE CULTURES. 



By R. St John Brooks, M.D., D.P.H., M.A. 

 and Mabel Rhodes. 



In the Transactions of the British Mycological Society- , vii 

 (1922), p. 237 a note appeared regarding the work of the National 

 Collection of T\*pe Cultures and its extension from the purely 

 medical and veterinary side so as to include representative 

 fungi derived from various sources. The scope of the mycological 

 collection was made to include cultures of fungi of importance 

 in ph\i:opatholog}', medical and veterinary science, technical 

 and soil biolog}-, t\-pes useful for teaching purposes and any 

 rare or interesting species. 



Through the eft'orts of the standing committee appointed bv 

 the British Mycological Societ\- to ad\-ise and assist the staff 

 of the Collection in all questions appertaining to fungi, and of 

 mycologists in various parts of the comitry a considerable 

 amount of progress has already been made. The following list 

 of fungi and of bacteiia of economic interest at present main- 

 tained in the National Collection has been prepared so that the 

 resources of the Bureau may be made available to as wide a 

 circle as possible. The staff of the Collection are fully conscious 

 of many important omissions and will be glad to have the 

 assistance of members of the Societ\- in fiUing in these lacunae. 



