Arcyria. 145 



portion of the capillitium threads not occupied by tlie pro- 

 minent ridges being ornamented with a dehcate network of 

 slightly raised lines. 



(Rostafinski's Synonyms.) 



Arcyria fcrruginea, Sauter., p. 316 (1811). 

 Arcyria latcritia, DeBy. Mycet., 24 (1859). 

 Arcyria fcrruginea, Fckl. Sym., p. 337 (1869); Berk, and Br., 

 Ann. Nat. Hist., No. 1603 ; Grevillea, v., p. 13. 



Arcyria incarnata, Rost. 



Sporangia crowded, ovate or sub-globose, stem very short or 

 absent, wall reddish, often with a brown or yellow tinge ; mass 

 of spores and capillitium flesh-colour, rosy, or reddish-brown, 

 sometimes ochraceous ; ccqnllitium attached to the apex of stem- 

 wall, and ivith very few attachments to hasal portion of thin, 

 sporangial wall, threads combined to form a dense, elastically 

 protruding network, with many free, fattened, or swollen sjnnose 

 tips, markings in the form of half-rings or spines, or a mixture 

 of the two arranged in a loose spiral, and mixed with small, 

 spinose warts, there are frequent swellings in the length of the 

 threads; spores globose, smooth, pinkish or tinged with ochre, 

 6 — 8 ju, diameter. 



Arcyria incarnata, Rost., Mon., p. 275, figs. 187, 199 ; Cooke, 

 Myx. Brit., p. 71, figs. 187, 199. 



Arcyria adnatcc, Rost., Mon. Supp., p. 72. 



M'sicc. — Fuckel, Fung. Rhen., 1442. 



On rotten wood and bark. Britain (Lyndhurst, Kew, King's 

 Cliffe, Norths, Carlisle, Aboyne, N. B.) ; Europe ; United States ; 

 India ; Ceylon. 



Usually crowded, sub-sessile. To — 2 mm. high. The wall of 

 the sporangium is thinner, and the permanent base little or 

 not at all longitudinally ribbed ; the capillitium threads are 

 generally round, but sometimes compressed. Closely allied to 

 A. jmnirra, of which the present is perhaps only a variety; 

 intermediate stages between the two ai'e not wanting. 



