300 A Monograph of the Myxogastres. 



witli numerous small, discoid, coloured projections irregularly 

 scattered, combined to form an irregular network, interstitial, 

 small, elliptical swellings containing colourless granules of lime, 

 very rare ; spores brown with lilac tinge, globose, coarsely warted, 

 14 p. diameter. 



Physarum cinereum, Sacc., Myc. Ven., Exs., n. 1101. 



On living or dead leaves, twigs, &c. Britain (Epping Forest) ; 

 Italy. 



The above, if in reality a variety of Physarum cinereum, 

 differs considerably in the structure of the capillitiuui and the 

 large, coarsely warted spores. Its occurrence in Britain and 

 Italy suggests it to be a constant form. 



Physarum chrysotrichum, B. and C. T.loAe-otiuv 



Sporangia sessile, subglobose when scattered, often irregular 

 or crowded and more or less confluent, wall rigid, usually 

 granulated with projecting lumps of lime, varying from yellow 

 through fulvous to almost clear vermilion; capillitium dense, 

 nodes numerous, large, irregularly angular, filled with yellow or 

 tawny lumps of lime, connected at various points by long, thin, 

 empty intcrnodes, some of the nodes are small and without lime ; 

 spores lilac, globose, minutely warted, 7 8 p diameter. 



Physarum chrysotrichum, B. and C., Grev., vol. ii., p. 66. 

 (Type in Herb. Berk., Kew, n. 10,804.) 



Physarum inaequalis, Peck, 31st Report, p. 40. 



Badhamia decipiens, Host., Mon. A pp., p. 4. 



"Physarum subglobosum, (B. and C.)." Sacc., Syll., vii, 1, 

 n. 1226. (I am not aware that there is any such species by 

 B. and C., and it is obviously a slip in Saccardo's Sylloge for 

 P. chrysotrichum. 



On moss, wood, &c. United States. 



The type specimen is a true Physarum, as will be seen by 

 the above description, and on the~ same piece of moss-covered 

 wood ranges through the colours given above. 



Physarum scrobiculatum, Mass. P-c-vmeTium 1 

 Sporangia sessile on a broad or narrowed base, seated on a 



