28 Crossland: Fungus Foray at Sandsend. 
fact in this connection that the spores in some species become 
binucleate before they are removed from the basidium. 
The absence of a true morphological sexual fusion or any- 
thing corresponding to cross-fertilization may possibly have 
some connection with the variation of the Fungus body. 
The Relative Frequency of the Species of Agarics. 
(ABSTRACT). 
i (GIBBS. 
THE author gave the results of a comparison of the lists pub- 
lished for twenty-one forays, sixteen being held in Yorkshire 
by members of the Yorkshire Naturalists’ Union, and five in 
the South of England by the British Mycological Society. 
The study of the distribution of Fungi is difficult, owing 
to the uncertain appearance of species from one year to another, 
thus we may work a district for many years, and yet constantly 
meet with additional species each year. A comparison of the 
foray lists illustrates this fact even in regard to the commonest 
species, thus only two species Paxillus involutus and Marasmius 
peronatus appear in the whole of the twenty-one lists, while 
at almost every foray, certain universally common species are 
‘conspicuous by their absence.’ Some species are particu- 
larly liable to be under-represented in foray lists, owing to 
their periods of maximum abundance not coinciding with the 
(dates of the forays; the most striking example of this is 
Tvicholoma gambosum, a fairly frequent species, but which 
on account of its usually appearing in spring has only been 
recorded at two of the Yorkshire forays. This cause also 
accounts for the sparse appearance at forays of such late 
autumn species as Clitocybe cyathiformis, Collybia velutipes, 
Tubaria purpuracea, and Pleurotus ostreatus. 
Certain species appear to be commoner in the South than 
in Yorkshire. Among these may be mentioned Amanita 
muscaria, and mappa, Armillaria mucida, Clitopilus prunulus, 
Cantharellus cibarius and tubeformis, Marasmius erythropus 
and epiphyllus, and many species of Cortinarius. On the other 
hand, Lepiota acutesquamosa, Mycena acicula, Omphalia 
umbellifera, Bolbitius titubans, Hygrophorus eburneus and 
Lactarius volemus, all well marked, and frequent Yorkshire 
species, do not appear in any of the Southern lists. 
It must, however, be admitted that the data are at present 
insufficient for any certain conclusions. 
—:0 :—— 
Mr. W. Bagshaw has offered to furnish a room in the park mansion at 
Batley as a Museum. 
Naturalist, 
