68 
BNDOSPOR^. 
[PHYSARELLA. 
described as being similar to F. septica, but with darker spores 
(violet-black or almost black), 9-16 fx, average 10 /x ; according 
to Raciborski it is a form of the latter species (see Hedw. 1887, 
p. 111). The character of the spores appears to place it rather 
under F. ochracea. 
Genus 5.— CIENKOWSKIA Rostafinski, Versuch, p. 9 (1873). 
Sporangium-wall cartilaginous at the base; capillitium a loose 
network of rigid threads with many free, curved, sharp-pointed 
branchlets, connected with flat perforated calcareous plates 
attached at their margins to the sporangium-wall. 
1. C. reticulata Rost., Versuch, p. 9 (1873). Plasmodium? 
Sporangia consisting of winding branched cylindrical plasmodio- 
carps, sometimes forming a net, attached by a narrow basal keel 
to the substratum ; 0'5 mm. diam., yellow-brown with transverse 
pale ridges, blotched with crimson ; sporangium- wall orange-yellow, 
membranous above, cartilaginous below, marked with the bases of 
the calcareous plates of the capillitium. Columella none. Capil- 
litium consisting of flexuose, branching, rigid, yellow hyahne 
threads, 'irregularly anastomosing, with numerous free sharp- 
pointed uncinate branchlets, and of lime-deposits in the form of 
flat, perforated, pale yellow plates disposed transversely to the axis 
of the spoi'angium and connected by broad or narrow attach- 
ments to the sporangium-wall ; occasionally with irregular lime- 
knots intermixed. Spores clear violet-brown, minutely spinulose, 
9 to 11 /A diam. — Rost., Mon., p. 91 ; Cooke, Myx. Brit., p. 11, 
fig. 107 ; Mass., Mon., p. 337. Physarum reticulatum Alb. & 
Schw., Consp. Fung., p. 90 (1805). 
Plate XXV., A. — a. plasmodiocarp, x 2 ; 5. portion of plasmodiocarp, in 
part broken, and showing the parallel plates of lime among the spores, x 20 ; 
c. capillitium and spores, x 280 ; d. spore, x 600 (Sibbertoft, England). 
Hah. On dead wood. — Sibbertoft, Leicestershire (L:B.M.43) ; 
France (Edin. Herb.) ; Germany (Strassb. Herb.) ; Java (K. 1772). 
Genus 6.— PHYSAEELLA Peck, in Bull. Torr. Bot. CL, ix., 
p. 61 (1882). Sporangia stipitate, shortly cylindi'ical, perforated 
by a deep umbilicus. Capillitium of delicate . parallel threads 
with minute fusiform lime-knots and stout spine-like processes 
projecting perpendicularly from the sporangium-wall. 
1. P. mirabilis Peck, I.e. Plasmodium rich yellow. Total 
height 3 mm. Sporangia shortly cyhndrical, inclined, 0-8 mm. 
long, 0-6 mm. broad, gregarious, stipitate, perforated by a deep 
umbilicus, which is continuous with the hollow stem, greenish or 
reddish-yellow. Sporangium-wall thickened with innate deposits 
of yellow Hme-granules and studded with the bases of the spine- 
like processes of the capillitium, at length dehiscing round the 
margin of the cylinder, and recurving in stellate lobes from the 
wall of the umbihcus, which persists to form a hollow pseudo- 
columella. Stalk cylindrical, slender, broader at the base, striate, 
