106 ENDOSPORE.E. [LEPIDODERMA. 



The specimen from Ceylon, named by Berkeley Didymium leoninum 

 (K. 1554), which is given by Rostafinski as a synonym for 

 L. tigrinum (Mon., App., p. 23), is immature, the capillitium and 

 spores being undeveloped ; the deposits of lime on the cartilaginous, 

 orange sporangium-wall are in the form of large stellate crystals ; 

 those in the spongy tissue of the columella are in rounded masses as 

 in typical . tigr'mum. The type specimens of L.fidvum Mass., from 

 Scarboro' (Herb, Mass.), and from Belle Croix, France (K. 1555 ; 

 Paris Herb.), are immature specimens of L. tigrinum\ the spores appear 

 warted under a high magnifying power, though the warts are faint 

 from their unripe condition ; the French specimen is part of the 

 large gathering by Roussel, given as a t} 7 pe of L. tigr'mum by 

 Rostafinski (Mon., p. 188). Growing with stalked specimens of 

 L. tigrinum, Prof. Farlow has twice found, in Massachusetts, sporangia 

 of a sessile, depressed form, with capillitium and spores exactly as in 

 the type, but with the sporangium-wall of two layers, the outer 

 delicate, ochraceous, densely charged with irregular granules of lime, 

 separating more or less from the inner layer, which is yellow and 

 membranous above, orange and cartilaginous towards the base ; the 

 columella is small and depressed. Taken by itself this form would be 

 a Chondrioderma, but considering its association with sporangia of 

 L. tigr'mum, from which it differs only in shape, and the granular, not 

 crystalline, condition of the lime on the sporangium- wall, it appears 

 that it is a form of this species. 



Hub. On bark, moss, etc. Leighton, Beds (L:B.M.80) ; Inverary, 

 Scotland (K. 568) ; France (K. 1555) ; Denmark (K. 1557) ; Germany 

 and Italy (Strassburg) ; Ceylon (K. 1554) ; Mass., U.S. A. (L:B.M.80) ; 

 S. Carolina (Paris). 



2. L. Carestianum Host., Mon., p. 188 (1875). Plasmodium ? 

 Sporangia forming elongate, pulvinate plasmodiocarps, 10 to 

 15 mm. long, 1 mm. thick, brownish-grey, closely beset with 

 white crystalline scales of lime; sporangium -wall cartilaginous, 

 dark brown. Columella hardly evident, represented by the 

 thickened dark brown base of the sporangium-wall, enclosing 

 rounded nodules of lime. Capillitium of colourless, and pale- 

 brown, branching and anastomosing threads, 2 ^ thick. Spores 

 dark purplish-grey, minutely spinulose, 12 to 18 //, diam. Mass., 

 Mon., p. 255. Reticularia Garestiana Rabenh., Fung. Eur., 

 No. 436 (1862). 



Plate XL!., B. e. part of plasmodiocarp, x 20 ; /. capillitium and 

 spores, x 280 (Italy). 



This species appears to be represented by a single gathering, and 

 would seem to be a plasmodiocarp form of L. tigr'mum. 



Hal. On twigs. Carestia, North Italy (B. M. 578). 



The type specimen of Didymium granuliferum Phillips (Badhamia 

 granulifera Mass., Mon., p. 321) from Dr. Harkness, Blue Canon, 

 California (L:B.M.78), has the sporangia subglobose or extended, 

 somewhat depressed, sessile on a broad base, 2 to 3 mm. long, gre- 

 garious on an effused hypothallus, which, together with the sporangia, 

 is pale brown, and thickly studded with crystalline scales ; the 

 sporangium-wall is of two layers, the outer cartilaginous, pale-brown, 

 with deposits of lime in the form of closely set, angular, crystalline 



