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B. Nodes of the net expanded : — 
A. Sporangia nnt-brown — 
a. Cup perforated at the margin, merging into the 
branching nodes. 5. C. macrocarjm 
h. Gup well-defined, nodes flattened, angular, branching, 
continued into the connecting threads. 
6. C. auranliaca 
c. Cup replaced by strong ribs, nodes flattened. 
7. C. sple7idens 
d. Cup well-defined or absent, nodes thickened, pro- 
minent, nvimerous — 
Nodes with many free rays, connected by more or 
less parallel delicate threads. 8. C. intricata 
Nodes rounded in outline, with few or no free 
i-ays, connected by three to five delicate threads. 
9. C. tenella 
B. Sporangia purple- or red-brown — 
a. Stalk two to three times the height of the spo- 
rangium, plasmodic granules 2 //, diam. 
10. C. pyrif(yrmis 
h. Stalk four to six times the height of the spo- 
rangium — 
Cup one-third of the sporangium, nodes polygonal, 
plasmodic granules 0'5 to 1 /x, diam. 
11. C. languescens 
Cup minute or absent, nodes rounded, prominent, 
plasmodic granules 1*5 to 2 /x, diam. 
12. C. microcarpa 
c. Sporangia purple — 
Cup one-third the sporangium, 0*7 mm. diam. 
13. G. purpurea 
Cup one-half the sporangium, 0*5 mm. diam. 
14. C. elegans 
D. Sporangia violet-blue, sporangium 0'25 mm. diam. 
15. C. violacea 
1. C. argillacea Pers., in Eomer, N. Mag. Bot., i., p. 91 (1794). 
Plasmodium lead-coloured, in rotten wood. Total height 0'75 to 
1-5 mm. Sporangia globose, crowded, stipitate, erect, or sessile, 
0'5 to 0"8 mm. diam., clay-coloured ; cup imperfectly defined ; 
sporangium-wall subpersistent throughout, delicately membranous 
above, stouter towards the base, reticulated with strongly or 
faintly thickened bands, which are beset with dark plasmodic 
granules 1 /x diam., and form a net with hardly expanded nodes 
and subquadrangular meshes about 0*1 mm. wide. Stalk 
