32 ENDOSPOREAE [BADHAM1A 



dark a3 in the type, loosely adhering, and scarcely rougher on one 

 side, not exceeding 10 to 11 /x diam. All intermediate forms occur 

 between this and the typical form with its large and rather compact 

 clusters of darker larger spores. B. hyalina Berk, is described as 

 differing from B. capsulifera in having spherical instead of obovate 

 sporangia, but as we not infrequently meet with both spherical and 

 pyriform sporangia intermixed the shape cannot be accepted as 

 distinctive. B. capsulifera takes precedence as being the older specific 

 name. Possibly B. melanospora Speg. (in Anal. Soc. Cient. Arg., 

 p. 150, 1880) with sessile sporangia and black spores clustered or free 

 measuring 15 /x, is a form of B. capsulifera, but in the absence of the 

 type this must remain uncertain. 



Hob. On logs of fir, oak, alder, etc. — Batheaston, Somerset (B.M. 

 36); Bristol (B.M. 79); Leighton, Beds (B.M. 1170); Luton, Beds 

 (1171); Lyme Regis, Dorset (B.M. 1172); France (Paris Herb.); 

 Austria (B.M. 2062) ; Germany (B.M. 2063) ; Portugal (B.M. 2087). 



2. B. papaveracea Berk. & Rav. in Grev., ii. 66 (1873). 

 Plasmodium ? Sporangia subglobose, greyish- white, nearly 

 smooth, 0-7 to 1 mm. diam., shortly stalked or sessile, 

 gregarious ; sporangium-wall with scanty deposits of lime. 

 Stalk firm, dark brown, rarely straw-coloured, 02 to 0-3 mm. 

 high. Capillitium as in B. capsulifera. Spores purple- 

 brown, closely compacted in clusters of 6 to 10, more strongly 

 warted on the outer third, 10 to 13 /x diam. — Rost. Mon., App 

 p. 3 ; Mass. Mon., 323 (in part) ; Macbr. N. Am. Slime- 

 Moulds, 69. B. hyalina var. papaveracea Lister Mycetozoa 

 30 (1894). 



PI. 3.— d. sporangia ; e. two clusters of spores ; (New Jersey). 



This species is closely allied to B. capsulifera and connected with it 

 by intermediate forms ; it is distinguished by the firmer stalks and the 

 smaller more compact spore-clusters. 



Hab. On bark. — Pennsylvania (B.M. 996b) ; Massachusetts (B.M. 

 1173) ; New Jersey (B.M. 1862) ; Japan (B.M. 1985). 



3. B. populina Lister in Journ. Bot., xlii. 129 (1904). 

 Plasmodium white or cream-white. Sporangia white, 

 subglobose or ovoid, smooth, 1-5 mm. diam., sessile, 

 heaped, or rarely solitary on short yellowish- brown stalks ; 

 sporangium-wall with abundant deposits of lime-granules. 

 Capillitium a coarse network of broad strands charged 

 with lime-granules throughout. Spores 10 to 12 p, diam., 

 in clusters of 16 to 20 or more, purple-brown, minutely 

 w T arted, the warting rather stronger on one side ; they are 

 usually marked by one or more narrow ridges or bands. 

 — Sturgis in Colorado Coll. Publ., Science Ser., xii. 11 (1907). 



PI. 2.— a. sporangia ; b. fragment of capillitium with two clusters of spores and 

 two free spores ; c. spores ; (England). 



This species is allied to B. capsulifera, but is distinguished by the 

 heaped white sporangia arising from white plasmodium, and by the 

 apores being usually banded. Amongst numerous gatherings made 



