Physa ru in. 301 



thick, wide-spreading hypothalhis, scattered or aggregated, often 

 irregular and aethalioid, or several blending together to form 

 a plasmodiocarp, pale flesh-colour, brittle, often furfuraceous ; 

 capillitium dense, forming an irregular network, nodes numerous, 

 large, irregularly angular, filled with yellow granules of lime, 

 connected at several points by long, thin, colourless internodes 

 without lime; columella absent; spores lilac-brown, globose, 

 minutely warted, 13 14 /u, diameter. 



Didymium scroliculatum, Berk., Hook. Journ., vol. iv., p. 66. 



Physarum cinereiMi, Sacc., Syll., vii., 1, n. 1189 (in part.). 

 (Type in Herb. Berk., n. 10,77-1) 



On charred wood. Australia. 



Distinct from P. cinereum in the size of the spores, wide- 

 spreading, firm hypothallus, and colour of the sporangia! wall. 



Physarum Rostafinskii, Mass. "P. c,< 



Sporangia distinct, conglomerated, sessile, rounded or angular, 

 depressed, exterior membrane thickish, granular, chalky, fragile, 

 yellow or ochraceous, interior wall thin, grey or yellowish, from 

 0*2 0'5 mm. diameter; capillitium furnished with numerous 

 irregularly angular nodes containing coloured granules of lime ; 

 columella cylindrical, spores minutely spinulose, blackish-violet, 

 8 9 ju, diameter. 



Physarum conglomeratum, Host., Mon., p. 109; Sacc., Syll., 

 vii., 1, n. 1184. 



On leaves, moss, &c. Germany; Sweden; Finland; San 

 Francisco. 



I am not acquainted with the present species, which is 

 certainly not Diderma conglomeratum, Fr., as supposed by 

 Rostafinski, hence the localities given by Rostafinski may or 

 may not show the distribution of this species ; the same applies 

 to his synonyms. 



(Rostafinski's Synonyms.) 



Diderma ochraceum, Hoffm., Fl. Germ., iii., t. 9, f. 2, b (1795). 

 Eeticularia ochracea, Poir., Ency. ap Streintz (1795). 



