170 ENDOSPOREyE. flRICHIA. 



differs from var. a. is the membranous sporangium-wall, which is 

 entirely free from granular deposits, and under a low magnifying 

 power is seen to be embossed by the impression of the spores. This 

 character, however, indicates so considerable a divergence from the 

 type, that if further gatherings established its constancy this form 

 should be marked as a distinct species. 



Hab. On bark and dead wood. /3. Batheaston, Somerset (B. M. 351) ; 

 a. Lyme Regis, Dorset (L-.B.M.139) ; a. Wanstead, Essex (L:B.M.139) ; 

 /3. Menmuir, Brechin, Scotland (B. M. 365) ; a. France (K. 997) ; 

 a. Germany (K. 1771) ; u. Poland (Strassb. Herb.) ; /3. Switzerland 

 (Strassb. Herb.); /3. Sweden (K. 1702) ; /3. Norway (Christiania Herb.) ; 

 /3. Mass., U.S.A. (L:B.M.139) ; /3. Iowa (L:B.M.139) ; a. Montana 

 (L:B.M.139) ; y. on fir and birch, Norway (L:B.M.139). 



8. T. erecta Rex, in Proc. Acad. Nat. Sc. Phil. (1890), p. 193. 

 Plasinodium ? Total height 1 to 2 mm. Sporangia globose or 

 subturbinate, stipitate or nearly sessile, scattered, 0*5 to - 7 mm. 

 diam., bright yellow, mottled with well-defined, dark brown 

 angular patches ; sporangium-wall membranous, pale yellow, 

 densely charged with brown angular matter in the dark patches. 

 Stalk cylindrical, 0'5 to 1 mm. high, 0*2 to 0'3 mm. thick, dark 

 brown, opaque. Capillitium of cylindrical bright yellow elaters, 

 3 '5 to 4 fj. diam., with short tapering ends ; marked with four 

 bands forming a close irregular spiral, beset with numerous spines. 

 Spores yellow, delicately warted, 11 to 13 /* diam. Mass., Mon., 

 p. 184. 



Plate LXIL, A. e. sporangia, x 20 ; /. elater, x 600; g. spore, x 600 

 (United States). 



A single specimen of this species has been found at Lyme Regis, 

 agreeing in every respect with the type received from Dr. Rex, except 

 that the stalk is very short, 0'5 mm. high. 



Hab. On dead wood, etc. Lyme Regis, Dorset (L:B.M.140 slide) ; 

 Philadelphia (L:B.M.140). 



9. T. fallax Pers., Obs. Myc., i., p. 59 (1796). Plasmodium rose- 

 coloured or white, in rotten wood. Total height 1*5 to 3 mm. 

 Sporangia turbinate, stipitate, gregarious, 0'6 to 0'8 mm. diam., 

 shining olive or yellow-brown ; sporangium- wall yellow, mem- 

 branous, of two layers. Stalk cylindrical, furrowed, 0'5 to 1 mm. 

 long, olive or dark brown ; hollow, filled to the base with spores 

 or spore-like cells. Capillitium of cylindrical, smooth, olive- 

 brown elaters, 4 ! 5 to 5'5 p diam., marked with four or five spiral 

 bands, 0*5 to 1 ^ broad, with intervals of 0*5 to 3 /x, gradually 

 tapering into long slender points. Spores yellow-brown, minutely 

 warted, or more or less distinctly reticulated on one side, 9 to 12 /JL 

 diam. Host., Mon., p. 243 ; Cooke, Myx. Brit., p. 61, figs. 221, 

 222, 233, 235; Blytt, Bidr. K. Norg., Sop. iii. (1892), p. 12; 

 Macbride, in Bull. Nat. Hist, Iowa, ii., p. 128 ; Mass., Mon., p. 192. 

 Arcyria decipiens Pers., in Usteri, Ann. Bot., xv., p. 35 (1795). 



Plate LXIL, A. a. sporangia, x 20 ; 1). elater, x 600 ; c. spores, x 600 

 (England) ; d. spore, reticulated on one side, spinulose on the other (United 

 States). 



