136 
ENDOSPORE.'E. 
[brefeldia. 
The complex structure of the capillitium is difficult to follow in 
the lower part of the eethalium ; towards the surface the sporangia 
are often separated from each other by a narrow interval. The sides 
of the sporangia are then seen to glitter with the numberless vesicles 
of the capillitium. The threads penetrate the adjacent sporangia to 
the distance of 0'07 to 01 mm., or about half the radius. The entire 
length of the threads, including the central vesicle, is 0*1 5 to 0-23 mm. 
The spores in the central part of the sporangium do not seem to be 
traversed by any threads. In the lower strata the threads are some- 
times attached at each extremity to folds of the membrane arising 
from the spongy base ; but the rigid collumellse, throughout the upper 
part at least, appear to be free from the capillitium. 
Hah. On dead wood. — Lyme Regis, Dorset (L:B.M.102) ; Darenth, 
Kent (B. M. 1110); Wanstead, Essex (L:B.M.102) ; Luton, Beds 
(L:B.M.102) ; near Birmingham (L:B.M.102) ; Boynton, Yorkshire 
(B. M. 1159); France (Paris Herb.); Sweden (K. 781); Germany 
(Strassb. Herb.) ; Mass., U.S.A. (L:B.M.102) ; Iowa (B. M, 1020). 
Rostafinskia australis Speg., in Ann. Soc. Cient. Argent., x., p. 151 
(1880), is described as forming an gethalium and having the surface 
composed of softly velvety tomentum, breaking up into powdery 
filaments ; the capillitium tubes of the lower stratum septate ; the 
spores lilac, ovoid or irregular, 8 to 10 x 5 to 6 /x. It does not appear 
to be a Mycetozoon. 
Cohort 11.— LAMPROSFORALES. Spores variously coloured, 
never violet. 
Subcohort l.—ANEMINEJE Rest, (extended). Capillitium 
not forming a system of uniform threads; either wanting, or 
represented by modifications of the sporangium-wall, which may 
be perforated or laciniated in sethalioid sporangia, or produced 
into tubular extensions in exceptional forms in the order 
Tuhulinaceae. 
Order I. — Heterodermace^ Rost. (extended). Sporangium- 
wall membranous, beset with microscopic round granules (plasmodic 
granules), and, except in Lindhladia, forming a net in the upper 
part ; capiUitium wanting ; spores 4 to 7 /a diam. 
KEY TO THE GENERA OF EETEROBERMACEJE. 
Sporangia sessile, compacted or lethaUoid, the wall not forming a 
net in the upper part. (22) Lindbladia 
Fig. 30.— Lindbladia Tuhulina Fries, 
a. J5thalium. Natural size. 
. Vertical section of asthalium. Magnified 6 times. 
Fig. 80. 
