CBATEBIUM.] PHYSARACE.E. 73 



from the centre to the circumference. Those in the lime-knots are 

 somewhat globular, and are often in clusters ; they vary from 5 \i to 

 about 20 [i diam., and dissolve rapidly in dilute carbolic acid. (Noted 

 in the Kew coll., 1888. A. L.) Physanjni scyphoides Cke. & Balf. 

 appears to be a form of C. leucocephalum ; the sporangium-wall 

 ( x 560) is veined with yellow, and possesses the colourless pits charged 

 with lime-granules of the type, from which it only differs in the more 

 delicate wall in the upper part, and in the somewhat obovoid shape of 

 some of the sporangia. C. cyl'mdrlciun Mass, is a form of C. leuco- 

 << }>l,<iluin with cylindrical sporangia ; and in no other character does 

 it differ from the broader type, with which it is connected by inter- 

 mediate links. The specimen issued by Fuckel as C. mutabile Fr., 

 1455 Fung. Rhen. Exs. (B. M. 481, K. 300), (C. Furl-.Ut Mass.), is a 

 subglobose form of C. leucocephalum with the lime in the sporangium- 

 wall almost absent ; the spores measure 9 to 10 ju diam., and are 

 minutely spinulose. C. in'm/nnim Berk. & Curt, is represented in 

 Ravenel' s collection, B. M. 873, " fide Berkeley." It is the cylindrical 

 form of C. Itin '" >-jili<iln.iit the sporangia are rufous below, white and 

 pruinose in the upper part ; the capillitium shows a pseudo-columella, 

 and the spores are typical. 



Hob. On dead leaves. Wanstead, Essex (L:B.M.48) ; Luton, Beds. 

 (L:B.M.48) ; France (K. 282); Germany (B. M. 471): Austria 

 (B. M. 1058) ; Sweden (K. 298) ; Italy (K. 297) ; Java (Strassb. 

 Herb.) ; Pennsylvania (L:B.M.48) ; Ohio (L:B.M.48) ; Georgia 

 (B. M. 455) ; Brazil (K. 274). 



5. C. mutabile Fries, Syst. Myc., iii., p. 154 (1829), non Symb. 

 Gast. Plasmoclium lemon-yellow, among dead leaves. Total 

 height ! 7 to 1 mm. Sporangia ovoid or globose, 0*4 to 0'6 mm. 

 diam., stipitate, erect, gregarious, rugose, without a defined lid, 

 golden yellow or greenish, bright yellow on the summit, breaking 

 up at maturity in the upper part into areolae, or dehiscing almost 

 to the base in stellate lobes ; sporangium-wall single, membranous, 

 with deposits of innate yellow lime-granules, which are denser 

 and of a deeper yellow on the summit, somewhat stouter and 

 more persistent at the base, where it is continued into the 

 cartilaginous stalk. Columbia represented by a central mass of 

 confluent lime-knots, not always present. Stalk cylindrical. 0'2 

 to 0'5 mm. long, stout, deeply furrowed, nearly translucent, 

 but charged with lime-granules, orange-red or yellow, arising 

 from a circular hypothallus. Capillitium of irregularly shaped 

 yellow lime-knots, varying much in size, connected by a network 

 of hyaline threads with triangular expansions at the axils of the 

 branches. Spores violet-brown, spinulose, 8 to 9 /A diam. YVallr., 

 Fl. Crypt. Germ., ii., p. 357. Trichia aurea Schum., En. PI. 

 Saell., ii., p. 207 (1803). Craterium aureuin Host., Mon., p. 124 

 (1875) ; Cooke, Myx. Brit., p. 20; Mass., Mon., p. 269. 



Plate XXVIII.. A. a. to d. sporangia of various forms, x 20 ; e. 

 capillitium and spores, with fragment of sporangium-wall, x 280 ; /. 

 spore, x 600 (England). 



Hub. On dead leaves, etc. Lyme Regis, Dorset (L:B.M.49) ; Luton, 

 Beds. (L:B.M.49) ; Batheaston, Somerset (B. M. 133) ; Appin, 



