CHONDRIODERMA.] PHYSARACE.E. 83 



Hub. On dead leaves, moss, etc. Herb. Bloxam (Leicester?) (B. M. 

 26) ; Jedburgh, Scotland (K. 1477) ; Northumberland (Edin. Herb., 

 ex Herb. Grev. ; K. 1478, ex Herb. Sowerby). 



10. C. Sauteri Host., Hon., p. 181 (1875). Plasmodium ? 

 Sporangia subglobose, depressed, sessile, somewhat aggregated, 

 - 7 to 1 mm. diam., smooth, pale pinkish-brown ; sporangium- 

 wall of two layers, the outer cartilaginous, thin, brittle, shining, 

 more or less charged with innate lime-granules, separating from 

 the membranous inner layer. Columella hardly evident, a rugose 

 thickening of the base of the sporangium ; reddish-brown. 

 Capillitium not very abundant, of sparingly branched colourless 

 or pale violet threads, 2 to 4 /A broad, persistent at the base. 

 Spores dark violet-brown, spinulose, 10 to 13 /x diam. Mass., Mon., 

 p. 217. C. acukatum Rex, in Proc. Acad. K Sc. Phil. 1891, p. 390. 



Plate XXXIII., A. a. sporangia, x 20 ; b. capillitium, with fragments of 

 sporangium-wall, x 280 ; c. spore, x 600 (Salzburg, Tyrol). 



The specimen in the Strassburg collection named previously 

 " Diderma deplanatum, ex. Herb. Sauter, ad muscos in montibus Salz." 

 appears to be the type given by Rostafinski (Mon., p. 181), and is well 

 described as " of coffee-and-milk colour, the outer wall brittle, separat- 

 ing from the inner, which is membranous and colourless." The species 

 described by Dr. Rex as C. aculeatum (I.e.] (L:B.M.61) is identical in 

 all its characters with C. Sauteri. The specimen in Greville's coll. 

 in the Edinburgh Herb, named " Diderma? Appin. Carm." is the 

 same form and probably part of the same gathering as K. 403, named 

 " Diderma melaleucum Carm.," with a descriptive note stating that it was 

 gathered in Scotland by Capt. Carmichael. It differs from the 

 Salzburg and American gatherings in the rather darker and larger 

 sporangia, and in the broader, almost simple threads of the more 

 scanty capillitium, but it appears to be the same species. 



Hab. On dead wood, moss, etc. Appin, Scotland (K. 403) ; Salzburg, 

 Tyrol (Strassb. Herb.) ; Philadelphia (L:B.M.61). 



11. C. radiatum Host., Mon., p. 182, figs. 152, 155, 156, 170 

 (1875). Plasmodium pale yellow, among dead fir and oak leaves, 

 and stripped bark. Total height 0'7 to 1 mm. Sporangia sub- 

 globose, flattened or umbilicate beneath, stalked or sessile, smooth 

 or somewhat wrinkled and rimose, 0'7 to 1*2 mm. diam., pale grey 

 or brownish or red-brown, crowded or scattered; sporangium-wall 

 breaking irregularly above, occasionally dehiscing from the naked 

 globose mass of spores in re volute lobes, cartilaginous, obscurely 

 granular, with a membranous inseparable inner layer. Stalk 

 short, 0*2 to 0'5 rum. high, thick, yellowish-brown, charged 

 throughout with white lime-deposits. Columella hemispherical 

 or subglobose, 0*5 mm. diam., densely calcareous. Capillitium 

 abundant, dark violet-brown, radiating from the columella in 

 somewhat rigid threads, sparingly branched except at the colour- 

 less extremities, usually roughened with minute wart-like thicken- 

 ings ; rarely pale, delicate, and flexuose. Spores dark violet-brown, 

 closely and minutely spinulose, 9 to 12 /A diam. Cooke, Myx. Brit., 

 p. 40; Blytt, Bidr. Norg., Sop. iii. (1892), p. 6; Mass., Mon. 



