Significance of Sex and Nuclear Fusions. Harold Wager. 317 



tion than that required for amphimixis. It is not improbable, 

 therefore, that this affords a sufficient explanation, on the evi- 

 dence available, of what is taking place in the higher Fungi 

 where the endokaryogamy, a simple type of nuclear fusion 

 which seems to be concerned solely with rejuvenescence, is 

 apparently taking the place of a more complex process of binary 

 sexual fusion. 



RECORDS OF SURREY RESUPINATE 

 HYMENOMYCETES. 



By E. M. Wakefield, F.L.S. and A. A. Pearson, F.L.S. 



The species in the third list we bring forward were for the 

 most part collected within the same area as those recorded in 

 the Transactions for 1917 and 1918. Our search, however, has 

 been extended to include the woods in the Horsley district, 

 which is the beginning of the chalk soil and is characterised by 

 an abundance of beech. Sistotrema variecolor is included for its 

 interest, though found in Hampshire. The Hst includes a number 

 of species new to Britain, and we wish to express our gratitude 

 to Monsieur I'Abbe Bourdot for valued help in determining 

 many of these. 



Tulasnella incarnata Juel. 



This species is probably not uncommon in this country, but 

 may be mistaken for a thin form of Peniophora incarnata, 

 although there is a distinct difference in the colour when the 

 two plants are compared. 



Hypochnella violacea (Awd.) Schroet. 



The second record for Britain. It was found for the first time 

 during the Doncaster Foray in 19 14. 



Corticiiim fiavesccns (Bon.) Mass. in Journ Linn. Soc. xxvii, 



1890, p. 149. HypochnusfiavcsceusBon.,lla.ndh.p.i6o. 



Irregularly effused, thin and pulverulent, whitish to dirty 



buff, with the habit of C. botryosum. Hymenium loose, as in 



6—2 



