hemitrichia] tiuchiaceae 225 



Hub. On dead leaves, bramble stems, etc.— Wanstead, Essex, 

 (B.M. 1945) ; Devon (B.M. 2978) ; Dorset (B.M. 2979) ; Witley, 

 Surrey (B.M. 2980); Leighton, Beds (B.M. 2981); Broseley, Salop 

 (B.M. 2982) ; Sweden (B.M. 2983) ; North Germany (B.M. 2984) ; 

 Ceylon (B.M. 2985). 



4. H. minor G. Lister in Journ. Bot., xlix. 62 (1911). 

 Plasmodium ? Sporangia stalked or sessile, scattered or 

 united in pairs, subglobose, 0-2 to 0-4 mm. diam., glossy, pale 

 yellowish-buff ; sporangium- wall membranous, pale yellow, 

 minutely papillose or marked with faint curved lines of 

 thickening, and having scanty superficial deposits of refuse 

 matter. Stalk black, cylindrical, enclosing dark refuse matter, 

 01 to 0*2 mm. high. Capillitium a loose network of flaccid 

 yellowish threads 3 to 4 /x diam., with few or many free 

 ends, marked with three or four faint spiral bands, either 

 almost smooth or rather closely studded with slender spines 

 1 to 4 {J. long, often showing ovoid vesicular expansions. 

 Spores pale yellow, closely and. minutely warted, 9 to 

 10 /x diam. 



PI. 187. — d. sporangia ; e. capillitium ; /. capillitium and spore with fragment 

 of sporangium-wall ; (Japan). 



This minute and inconspicuous species has been gathered in small 

 quantities on three occasions on the bark of fallen branches by Mr. K. 

 Minakata, in the province of Kii, Japan. It somewhat resembles 

 Perichaena vermicularis Rost., but differs in the capillitium being 

 marked with spiral bands. The capillitium threads vary in roughness 

 in the different gatherings ; in one specimen they are almost smooth, 

 in another they are closely marked with warts and short spines, while 

 in a third they are studded with both short and long spines. 

 H. minor is perhaps most nearly allied to H. Karstenii, as suggested 

 by Mr. Minakata, but we require more material to establish its 

 relations with certainty. 



Hob. On dead bark amongst Hepatics. — Tanabe, Kii, Japan 

 (B.M. 2986). 



5. H. clavata Rost. Versuch, 14 (1873). Plasmodium 

 wateiy-white. Total height 1 to 3 mm. Sporangia stalked, 

 gregarious, clavate or turbinate, rarely globose, 07 to 1*5 mm. 

 high, shining, ochraceous or olivaceous-yellow ; sporangium- 

 wall membranous, minutely papillose on the inner side, rarely 

 reticulated, yellow, evanescent above, persistent below to 

 form a more or less definite cup. Stalk cylindrical, Ol to 

 1*5 mm. long, furrowed or nearly even, olive, red-brown, or 

 nearly black, hollow and filled with spore-like cells. 

 Capillitium a network of yellowish- olive branched threads 

 5 to 6 /a diam., with or without rounded free ends, marked 

 with five to six well-defined close or lax spiral bands 1 /* wide, 

 usually velvety in profile, sometimes spinose in imperfect 

 developments. Spores ochraceous, minutely warted, 8 to 



