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MYCETOZOA RECORDED AS BRITISH SINCE 1909. 

 By G. Lister, F.L.S. 



Teis" years have passed since the third and latest edition of the 

 Guide to the British Species of Mycetozoa, j^ublished by the 

 Trustees of the British Museum, appeared. In the preparation ot" a 

 new edition, many changes had to be introduced in order to adai)t 

 the nomenclature to modern requirements, making it agree with that 

 used in the second edition of iYiQ Ilonograph of Mycetozoa, published 

 in 1911, and also to incorporate much additional information that 

 has been obtained. Owing to the cooperation of many observers, 

 five genei-a have been added to the British list and thirty -five species, 

 bringing the number up to 181. For convenience of reference it may 

 be useful to give a few notes on the additional species and varieties, 

 on where aud by whom they were found, and on some points of 

 nomenclature. 



Badhamia NITER'S Berk. var. reticulata G. Lister, in Trans. Brit. 

 Mycol. Soc. V. 71, pi. 1. figs. 2, 2 a, h, 1914. This variety differs from 

 the t^^ical form in the plasmodiocarp habit of the sporangia and 

 the more loosely clustered paler spores, which have a cap of minute, 

 not coarse warts. The one British gathering was made by my 

 father and myself in November 1888 on an old log at Uj)lyme, 

 Devon. It has been recorded from Poland, Ceylon, and Japan. 



B. AFFiNis Rost. This inconspicuous species has been found 

 repeatedly on the mossy bark of living trees ever since Nov. 1899, in 

 East and West Aberdeenshire, by the Rev. W. Cran. For years it 

 was put aside as a doubtful form, closely alhed to B. orliculata Rex, 

 from which it differs chiefly in shape and of which it may be only a 

 variety. It has been obtained from Pennsylvania and Japan. 



Phtsaeum globulifeeum (Bull.) Pers. The one British record 

 consists of a gathering made by the Rev. W. Cran, at Ballogie, 

 Aberdeenshire, October 1913. The sporangia and lime-knots are not 

 pure white, but have a slight brownish shade, suggesting a close rela- 

 tionship with P. murimim Lister, a species which differs in no other 

 respect but its brown colour, and which might be regarded as simply 

 a variety of P. glohuliferiim ; for convenience of reference, however, 

 it would seem better to keep the brown P. murinum as a distinct 

 species, as well as the yellow, orange-jed, purple-red, lilac, and blue 

 forms of ihQ^'' glohuUfertim'''' group, each of which has its separate 

 specific name. 



P. PULCHEEEIPES Pcck. A fine typical gathering was made by 

 Miss M. Rea in September 1916 in the grounds of Sir John Ross at 

 Rosstrevor, County Down, on a stump in a larch wood (see Irish 

 Naturalist, xxvi. 58, 64) ; this is apparently the only recoi'd for the 

 species beyond the United States. 



P. Li'TEO-ALEUM Listcr. This handsome species has been found 



repeatedly since 1910 in an alder copse at Uplyme, S.E. Devon, in 



early spring. It was also obtained in some abundance last January 



by Mr. N. G. Hadden at Porloek, Somerset, on dead leaves in a wood 



JorE^AL OF BoTAj,'!'.— Vol. 57. [May, 1919.] k 



