306 A Monograph of the Myxogastres. 



Exsicc Karst., Fung. Fenn., 698; Lib., Crypt. Ard., 376; 

 Fck)., F. Ehen., 1466; Cke., Brit Fung., Ed. II., 206; Ellis, 

 N. Amer. Fung., 1394; Klotzsch, Herb. Myc. (Rah.), 761; 

 Syd., Myc. March., 257; Rab., F. Eur., 798, 1913, 1070, 2139. 



On bark, wood, &c. Britain (Bristol, Hampstead, Castle 

 Howard, Yorks; Carlisle, Linlithgow) ; France; Germany; 

 Finland ; Austria ; United States ; Cuba ; Ceylon. 



Readily distinguished by the very much laterally compressed 

 plasmodiocarp. The outer wall is sometimes almost as porce- 

 lain-like as in Chondrioderma, but is usually rugulose. The 

 epispore varies, when seen under a power of 1200 diameters, 

 from almost smooth to being distinctly warted, and in some 

 instances the warts become bar-like and more or less combined 

 to form a very delicate and broken network. 



(Rostafinski's Synonyms.) 



itfticularia sinuosa, Bull., t. 446, f. 3 (1791); Sow., t. 6. 

 Physarum bivalve, Pers., Obs., t. 1, f. 2 (1796). 

 Trichia spliaerica, /3. polymorpha, Trent., p. 230 (1797). 

 Angioridium sinuosum, Grev., S. C. Fl., t. 310 (1828) ; Eng. 



Fl., v., 315 ; Cooke, Hdbk., n. 1142, fig. 128. 

 Diderma valvatum, Fr., S. M., iii., 109 (1829). 

 Didymium sinuosum, DR. and M., Fl. Alg., p. 411 (1846). 

 Carcerina valvata, Fr., S. V. S., p. 451 (1849). 

 Leocarpm melalcucus, Gay, in Mont. Syll, 1072 (1855). 

 Diderma contortum, Fckl., Sym. Mrc., 341 (1869). 

 Diderma pallidum, B. and C., in Grevillea, iii., 59 (1873). 



Physarum cerebrinnm, Mass. (n. sp.) (fig. 275). yli(y>*eft 



Aethalium naked, broadly effused, or in small scattered 

 patches, consisting of very much contorted and anastomosing folds, 

 greyish-lilac, sprinkled with minute particles of lime ; capillitium 

 consisting of numerous, irregularly anastomosing threads about 

 3 f* thick, with here and there usually interstitial, large, elon- 

 gated swellings filled with large, amorphous, yellow granules of 



