14 MYXOMYCETES. 



interwoven one with another, plane ; walls double, the outer thick, 

 containing lime, orange or snow-white, the inner thin and yel- 

 lowish ; capillitium containing numerous granules of lime in 

 irregular masses, uncoloured, usually without a columella ; spores 

 dull brown-violet, very spinulose, '011--0133 mm. Rtfki. Mon., 

 109. 



On dead grass, ferns, &c. 



var. a genuinum. 



Sporangia kidney-shaped, sitting on a wide base, gregarious or 

 complicated, from 1 to 1-5 long, 0'25 mm. wide. 



var. ft splendens. 



Sporangia elongated, twisted one with another, as it were inter- 

 woven, with the upper part sunk in, now and then much settled at 

 the margin, from 1 to 25 mm. long, 0'25 mm. wide. 



x 



Diderma contextwn, Pers. Obs. i., 89 (1796). Ditm. t. 39. 

 Cooke Hdbk., No. 1117. 



Physarum context urn, Pers. Syn., 168 (1801). 



Didymium contextual, Fr. Gast., p. 20 (1818). 



Lcocarpus contextus, Fr. S. V. S., 450 (1849). 



Chondrioderma contextam, Rtfki. in Fckl. Sym. Myc. ii., 74 

 (1873). 



7. Physaium sinuosum. (Bull.) 



Plasmodiocarp marginately flattened, narrow edge grown to the 

 substratum, elongated, twisted together, or combined in a reticu- 

 late manner, snow-white or slightly yellowish, usually splitting at 

 the apex with a longitudinal fissure ; walls double, the outer 

 thick, containing much lime, brittle, the inner thin-sided, greyish ; 

 capillitium strongly developed, containing numerous snow-white 

 granules of lime, always for the greatest part branched below, the 

 rest in irregular angular lumps ; spores brownish-violet, with a 

 thick tough membrane, smooth, '0083--009 mm. diam. Rtfki. 

 112. 



On various substances (fig. 91). 



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

 Pliysarum bivalve, Pers. Obs. t. i., f. 2 (1796). 

 Trichia sphcerica, P polymorpha, Trent., p. 230 (1797). 

 AitfiiorliJiinn siinmsiim, Grev. S. C. Fl., t. 310 (1828). Eng. Fl. 

 v., 315. Cooke Hdbk., No. 1142, fig. 128. 



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

 DMyminm sinuosum, DR. & M. Fl Alg., p. 411 (1846). 

 Carcerina valvuht, Fr. S. V. S., p. 451 (1649). 

 Leocarpus fiielaleucus, (i 'ay, in Mont. Syll., 1,072 (1855). 

 Diderma contortion, Fckl. Sym. Myc., 341 (1869). 

 Diderma pallidinn, B. & C., in Grevillea iii., 52 (1873). 



