PIIYSARUM.] 
PIIYSARACE^E. 
45 
eapillilium. Capillitium abundant, of extremely delicate branching 
and anastomosing threads without expansions at the axils, some- 
what persistent, and of a pale bluish colour after the dispersion of 
the spores; lime-knots white, few, small, fusiform except in the 
central globular cluster. Spores violet-brown, almost smooth, 
7 to 9 /X diam. — Tilmadoche compacta Wing., in Proc. Acad. Nat. Sc. 
Phil. 1889, p. 48; Mass., Mon., p. 332. LeindocUrma stellatum 
Mass., Mon., p. 252. 
Plate X., B. — a. sporangia, x 20 ; Z». stalk and capillitium with pseudo- 
columella and fragment of sporangium-wall, showing compacted and sharply- 
defined clusters of lime-gi'anules, x SO ; <?. capillitium and spores, x 280 ; 
d. spore, x 600 (Dominica). 
An excellent account of this species is given by Mr. Wingate (I.e., 
p. 48).- He describes the sporangium- wall as splitting on maturity in a 
floriform manner, which is a marked character in the specimens at 
hand ; his description of the stalk as " yellowish-white with a brown 
or blackish base " appears to be correct for the American gatherings. 
In a fiue specimen of P. com2Mctum in the Kew collection from 
Dominica (Ramage), K. 567, marked Leindoderma stellatum Mass., the 
stalks are pure white with a chalky section to the base. The specimen 
from French Guiana in the Paris Museum under the name Physarum 
leucophceum is precisely similar to that from Dominica in the large 
opaque white lime-spots on the sporangium- wall and in the pure white 
stalks. The type of Didymium columhinum Berk. & Curt. [Tilmadoche 
columhina Rest., Mon., App., p. 13), Venezuela (K. 1428), appears to 
be this species, but nothing now remains of the specimen but a few 
stalks and a little of the extremely delicate capillitium. 
Hah. On dead wood.— Borneo (L:B.M.20) ; Dominica (K. 567) ; 
Philadelphia (B. M. 875, L:B.M.20) ; Ohio (L:B.M.20) ; French 
Guiana (Paris Herb.). 
11. P. roseum Berk. & Br., in Journ. Linn., xiv., p. 84 (1873). 
Plasmodium? Total height 1 mm. Sporangia globose, 0-4 mm. 
diam., stalked, gregarious, nearly smooth, bright rose-coloured; 
sporangium-wall membranous, with innate clusters of purple-red 
lime-gi-anules. Stalk erect, slender, subulate, reddish-brown, 
translucent, longitudinally rugose. Columella none. Capillitium 
a loose network of deHcate pale lilac hyaline threads, with rather 
few large, irregularly branching, purple-red lime-knots. Spores 
reddish-lilac or reddish-brown, minutely sj)inulose, 7 to 10 //, diam. 
Post., Mon., App., p. 10; Mass., Mon., p. 294. 
Plate XI., A..— a. sporangia, x 20 ; h. capillitium with fragment of 
sporangium-wall and spores, x 280 ; c. spore, x 600 (Borneo). 
This species differs from P. p>ulcherrimum in the large lime-knots 
and the translucent stalk. 
Hah. On dead wood.— Ceylon (K. 1758) ; Borneo (L:B.M.21). 
12. P. Newtoni Macbride, in Bull. Nat. Hist. low a, vol. ii., 
4, p. 390 (1893). Plasmodium? Sporangia shortly stalked or 
sessile, globose, about 0-5 mm. diam., or flattened and umbilicate 
above, violet-purple, smooth, opaque; sporangium-wall mem- 
branous above, with innate deposits of purple lime-granules, 
rugo.se and thickened towards the base, whore it is deep purple 
