230 DECADES OF FUNGI, 



formi, disco stipitlformi afExo, lineatim striate postice subtiliter strigoso 

 velutino; poris subhexagonis elongatis; acie setoso-lacerata. 



Hab. Oa dead wood. Ceylon, 1851. (G, H. K. Thwaites, Esq.) 

 Pileus flabellato-reniform, 3 inches across, scarcely at all lobed, snb- 

 ocbraceous, streaked with delicate lines, thin, minutely strigose behind, 

 the pubescence being arranged so as to represent the edges of minute 

 pores. Stem a small disc. Hymenium tinged with brown. Pores 

 very variable in size, elongated, subhexagonaL Edge very thin, mi- 

 nutely toothed. 



The specimens are far paler and more entire than those from Churra, 

 but I have no doubt that the species is the same, though at first de- 

 scribed by me as distinct. 



493. Bidymlum Zeylanicum^ n. s. ; peridio lenticulari subtus umbili- 

 cato cretaceo demum fatiscente subtiliter pulverulento ; stipite sursum 

 attenuato elongato sulcato fulvo; capillitio candido; sporis nigris. 



Hab. On dead wood. Ceylon. (G. H. K. Thwaites, Esq.) 

 Stem 1 line high, tawny, incrassated below, attenuated above, sulcate, 

 attached to a shining hypothallas. Peridium lenticular, umbilicate 

 beneath, chalky white, at length cracking, delicately pulverulent. Ca- 

 pillitium white, branched, anastomosing here and there, stained with a 

 fuliginous tinge, very variable in thickness ; columella none. Spores 



globose, asVo ^^ ^^ i^^^ 1^1 diameter. 



This species resembles in some respects Physarum nutans ; but not 

 only is the stem sulcate, but the peridium is decidedly pulverulent, like 

 a leaf covered with Oidium, When the powdery coat is rubbed oiF, it 

 appears rugged, like the surface of an egg. 



494. JEcidium rJiytismoideum ^ n. s. ; maculis latis inustis rbytismoi- 



deis ; peridii margine lato laciniato ; sporis subangulatis. 



Hab. On the under sides of leaves of Diospyros. Ceylon. (G. H. K^ 

 Thwaites, Esq.) 



Spots ^ an inch or more broad, resembling exactly those of some 

 Rhytisma, Peridia scattered; margin spreading, broadly lobed, con- 

 sisting of pentangular or hexangular cells, the commissures of which 

 are finely crenate. Spores more or less angular. 



A very singular production. The black stroma is apparently 

 covered" with papillseform ostiola, but I have not been able to detect 

 any trace of reproductive bodies in them. I do not however assert 

 positively that it is really a part of the JEcidium. 



