ARCYRIA.] ARCYRIACE.E. 189 



Hab. On dead wood. Cape of Good Hope (K. 895, 949 ; L:B.M.157 

 slide). 



6. A. incarnata Pers., Obs. Myc., i., p. 58 (1796). Plasmodium 

 white, in rotten wood. Sporangia subcyliiidrical or ellipsoid, 

 stipitate or nearly sessile, crowded, 1 to 1*5 mm. high, 0'6 mm. 

 broad, flesh-coloured, more rarely red; cup of sporangium-wall 

 membranous, even or interruptedly plicate, spinulose. Stalk 

 weak, O'l to O3 mm. long, flesh-coloured, filled with spore-like 

 cells. Capillitium a very loose elastic network of pale pink 

 threads, 3 to 5 /x diam., sparingly and somewhat irregularly 

 branched, with here and there broad perforated or ring-like 

 expansions, often swollen at the axils of the branches ; thickenings 

 in the form of sharp cogs, half rings, or spines arranged as a 

 border or in a loose spiral, and of minute scattered spinules ; free 

 ends present, more or less numerous, clavate or pointed, spinose. 

 Spores pale flesh-coloured, smooth or with a few scattered warts, 

 6 to 8 ju, diam. Eost., Mon., p. 275; Cooke, Myx. Brit., p. 71, 

 figs. 187, 199; Mass., Mon., p. 145. Stemonitis incarnata Pers., 

 in Gmel., Syst. Nat., p. 1467 (1791). Clathrus adnatus Batsch, 

 Eleiich. Fung., p. 141 (1783). Arcyria adnata Rost., Mon., App., 

 p. 36; Blytt, Bidr. K. Norg., Sop. iii. (1892), p. 11 ; Macbride, 

 in Bull. Nat. Hist. Iowa, ii., p. 124. 



Plate LXVIII.. B. a. sporangia, x 20 ; b. capillitium, with portion of 

 sporangium-wall, and spores, x 280 ; c. spore, x 600 (England). 



This species is closely allied to A. punicea, from which it is chiefly 

 distinguished by the capillitium having free ends and being without 

 attachments to the cup, and by the more diffusely expanding net ; but 

 intermediate forms are of not infrequent occurrence. 



Hab. On dead bark, sticks, etc. Lyme Regis, Dorset (L:B.M.158) ; 

 Luton, Beds (L:B.M.158) ; Batheaston, Somerset (B. M. 270); 

 Edinburgh (K 886) ; France (Paris Herb.) ; Germany (B. M. 719) ; 

 Finland (B. M. 704A) ; Poland (Strassb. Herb.) ; Australia (K. 892) ; 

 Philadelphia (L:B.M.158) ; S. Carolina (K. 843). 



7. A. stipata Lister. Plasmodium? Total height 1-5 to 2 mm. 

 Sporangia cylindrical, stipitate, crowded, 1 to 1'5 mm. high, 

 0'6 mm. broad, copper-coloured, or deep brown with a carmine 

 tinge ; sporangium- wall irregularly evanescent above, the cup 

 plaited and smooth below, papillose at the rim. Stalk cylindrical, 

 0'5 to 1 mm. long, red- brown or brownish-black, filled with 

 spore-like cells, and rising from a membranous hypothallus. 

 Capillitium an elastic network of freely branching red threads, 

 2 '5 to 3*5 fji diam., marked with a border of broad-based spines 

 or blunt cogs, and with three to four faint spiral bands, sometimes 

 covered with minute spines in addition ; with many free clavate 

 ends and few attachments to the cup. Spores pale red, smooth, 

 or with few scattered warts, 6 to 8 /x diam. Leangium stipatum 

 Schwein., in Trans. Am. Phil. Soc., New Ser. 4, p. 258 (1834). 

 Hemiarcyria stipata Host., Mon., App., p. 41 ; Macbride, in Bull. 

 Nat. Hist. Iowa, p. 135. 



