222 A Monograph of the Myxogastres. 



Didymium physarioides, Klotzsch. 



Strongylium minor, Fr., Cast., p. 9 (1817). 



Physarum melanopus, Fr., Gast., p. 23 (1817). 



Conium lobatum, Spr., Syst., iv., 529 (1827). 



Didymium marginatum, Fr., S. M., iii., 116 (1829). 



Didymium melanopus, Fr., S. M., iii., 114 (1829); Berk., Ann. 



N. H., No. 382; Cooke, Hdbk., No. 1118. 

 Didymium hemispheric/urn, Fr., S. M., iii., 115 (1829). 

 Physarum nigrum, Fr., S. M., iii., 146 (1829); B. and Br., 



N. H., No. 1598; Grevillea, v., p. 12. 

 Cionium farinaccum, Link, Hdbk., iii., 416' (1833). 

 Didymium filamentosum, Wallr., 2187 (1833). 



Didymium affine, Raunk. ^vMnv* 1 



Sporangia spherical-hemispherical, stipitate. Stein thin, of 

 equal length or longer than the sporangium, expanded into a 

 circular hypothallus at the base, bright brown. Wall grey, 

 without lime, under the microscope colourless. Columella glo- 

 bose-semiglobose, with the colour of the stem or brighter. 

 ThreaTfe of the capillitium nearly hyaline, expanded into numer- 

 ous shortly fusiform, brownish-violet swellings. Spores smooth 

 or delicately warted, 8 9 /i diameter. 



Didymium affine, Raunk., Myx. Dan., p. 109 (in English), 

 Tab. 5, figs. 3, 4. 



On germinating seeds in laboratory. 



Copenhagen. 



An unusual Didymium certainly in the wall being without 

 lime. Possibly abnormal. 



Didymium Fuckelianum. Rost. 



Sporangia hemispherical, umbilicate below, stipitate, stem 

 whitish with gilvous or brownish shades, strongly plicate longi- 

 tudinally, lime on the wall in the form of stellate crystals, after 

 removal of the lime the wall is covered with unsymmetrical brown 

 or violet spots separated by colourless veins; stem entering the 

 sporangium as a distinct clavatc or applanatc brownish columella, 



