Yorkshire Naturalists at Riccall. 175 



from C. ohtiisata in the capillitium branching from the apex of 

 the short columella and not from all parts of the columella as 

 in C. ohtusata. 



In one larch wood the beautiful but destructive ascomycete, 

 Dasycypha calycina, was playing havoc with the trees, quite 

 one-third being dead or dying through its influence ; the fallen 

 branches being completely covered with the sporophores which 

 were humourously compared to microscopic lemon curd cheese- 

 cakes. In another wood of Pinus sylvestris and Larix mixed, 

 the latter trees were quite healthy and strong. About a dozen 

 more of the true fungi were also found, most of which, like the 

 mycetozoa, appeared to be of last year's growth. One of the 

 gems of the day was Mitrula laricina, a beautiful plant with 

 orange cap and white stem, found by Mr. A. E. Peck in moist 

 places under the shelter of pine trees. 



Prof. J, H. Priestley brought in some fine specimens of 

 Sclerotinia curreyana growing on rushes. 



A Corticium, along with a few other things, w^ere forwarded 

 to Mr. Crossland, who was unable to attend the excursion. 

 The Corticium could not be satisfactorily determined, and was 

 forwarded to Miss E. M. Wakefield, Royal Harbarium, Kew, 

 who is making a special study of the Thelephoracea, and will 

 report later on the Riccall specimen. 



Fungi. 

 Collybia tenacella. 

 Psilocybe ericcBa. 

 Galera hypnorum. 



,, tener. 

 Stereum. hirsutum. 



piirpureum. 

 Grandinia granulosa. 

 Hirneola auricula-judce. 

 Polystictus versicolor. 



„ abietinus. 

 Polyporus brumalis. 

 Dasyscypha calycina. 

 ,, virginea. 



,, nivea. 



Sclerotinia Ci rreyana. 

 Mitrula laricina. 



Mammals. — Mr. Sydney H. Smith writes : — The mole, 

 short-tailed and water voles are fairly numerous, and there are 

 more stoats and weasels than the keepers desire. 



Birds. — On the date of the excursion all the winter visiting 

 birds had departed, and only a few of the summer visitors were 

 in evidence. This is more particularly so this spring, the 

 majority of migratory species being very late in arriving. In 

 spite of these drawbacks Skipwith Common proved very inter- 

 esting. The colony of black-headed gulls is of course worthy 

 of first place ; as yet they had not commenced nesting in good 

 earnest, and there appeared to be barely more than twenty-five 



1918 June I 



Mycetozoa. 

 Badhamia utricularis. 



(Sclerotium stage). 

 Physarum nutans. 

 Didymium diffovme. 

 Reticithria Lycoperdon. 

 Comatricha obtusata. 



,, elegans Lister. 



Syn. Raciborskia elegans Berl. 

 Trichia scabra. 



,, varia. 



,, fallax. 



,, Botrytis. 

 Arcyria ferruginea. 



„ incarnata. 

 Diachcea corticalis. 



