PHYSARUM.] 
PHYSAllACEyE. 
43 
Spores violet-brown, almost smooth, 7 to 8 /x diam. — Kost, in 
Fuckel Symb. Myc, Naclitr., 2, p. 71. P. Sclmmacheri, Spreng. 
Sys. Veg., iv., p. 528 ; Rost., Mon., p. 98, App., p. 6 ; Cooke, 
Myx. Brit., p. 11 ; Mass., Mon., p. 275. P. Leveillei Host., Mon., 
App., p. 7 ; Mass, Mon., p. 296. 
Plate VIIT., B.— a. sporangia, x 20 ; h. capillitium and spores, x 280; 
c. spore, X COO (Englantl) ; d. sporangiam showing columella, x 20 (Ger- 
many, Strassburg Herb.). 
P. Kalchhrcnmri Mass., from the Cape (K. 347), is allied to P. cit- 
rinum, differing chiefly in the capillitium, which approaches that of 
Badhamia ; the nodes are irregularly expanded, bright yellow, and 
connected by more or less hyaline strands, 2 to 5 fi broad ; columella 
none, spores 8 to 10 n- Rostafinski separates P. SchumacJieri, vars. 
/3 and y, Mon., p. 99, and places them in his Appendix under the name 
of P. Leveillei ; the type specimen of var. /3 from Freiburg in the 
Strassburg collection is a large form of P. citrinum, but is fully 
equalled by the English gathering jBgured ; the spores measure 8 to 
9 /X ; the type of var. y from Munster is a very different form, and 
appears to be more nearly allied to P. ruhiginosum. The specimen 
from Venezuela in the Kew collection, marked by Rostafinski P. Leveillei 
var. /3, has a longer stalk than the typical P. citrinum, a more lax 
capillitium, and the spores measure 10 ju, but it can scarcely be viewed 
as a distinct species. 
Hah. On dead wood, moss, etc. — Bedfordshire (L:B.M.16) ; Germany 
(Strassb. Herb) ; Freiburg (L:B.M.16 ; Venezuela (K. 1261). 
7. P. variabile Rex,inProc. Acad. Nat. Sc. Phil., 1893, p. 371. 
Plasmodium? Total height about 1 mm. Sporangia piriform, 
ovoid, or subglobose, 0'4 to 0*5 mm. broad, stalked or sessile, 
rugose, somewhat glossy, yellowish olive ; sporangium- wall mem- 
branous, with dense innate deposits of yellowish lime-granules. 
Stalk stout, conical, furrowed, 0*4 mm. high or less, yellowish- 
brown, densely charged with white lime-granules. Columella 
none. Capillitium a close network of delicate hyaline threads 
with membranous expansions at the axils of the branches ; lime- 
knots numerous, irregularly branching, many large and confluent, 
white or pale yellow. Spores brownish-violet, spinulose, 9 to 1 2 /x 
diam. 
Plate IX., A. — a. sporangia, x 20 ; h. broken stalk showing lime ; c. capil- 
litium, with fragment of sporangium-wall and spores, x 280 ; d. spore, 
X 6C0 (United States). 
Hab. On dead wood.— Iowa (B.M. 812) : New York (L:B.M.17) ; 
Venezuela (L:B.M.17). 
8. P. melleum Mass., Mon., p. 278 (1892). Plasmodium 1 
Total height 0-8 mm.. Sporangia globose, stipitate, erect, brown- 
ish-yellow, 0-5 jji diam. ; sporangium-wall membranous, often 
wrinkled, persistent at the base, yellowish, with minute coloured 
lime granules sparsely distributed. Stalk white or faintly buff 
coloured, stout, opaque, with few shallow furrows, chalky in 
section.^ Columella short, conical. Ctxpillitium of irregularly- 
branching delicate hyaline threads, sometimes expanded at the 
