FUL1G0.] 



BRITISH MYCETOZOA 



21 



Genus 4. FULIGO Haller.— iEthalium 

 anastomosing sporangia enclosed by a 

 barren cortex. 



1. F. septica Gmel. — jEthalium pul- 

 vinate, from 2 mm. to 20 cm. broad, 

 yellow, sometimes cinereous or reddish. 

 Sporangium-walls within the asthalium 

 containing scattered innate deposits of 

 lime. Capillitium of hyaline threads with 

 yellow or whitish lime-knots. Spores 

 violet, nearly smooth, 6 to 10 ft. diam. 



Hab. On rotten wood, tan, etc. 

 Common. 



consisting of interwoven 



Fig. 12. — Fuligo septica Gmel. 



a. jEthalium. One-third natural 



size. 



b. Capillitium threads with 



lime-knots and two spores. 

 Magnified 120 times. 



Fig- *3- 



ClENKOWSKIA RETICULATA 



Rost. 



a. Part of branching plasmodio- 



carp. Magnified 4 times. 



b. Capillitium threads and part 



ol a perforated lime-plate. 

 Magnified 140 times. 



Genus 5. ClENKOWSKIA Rosta- 

 finski. — 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. 



C. reticulata Rost. — Plasmodiocarps 

 cylindrical winding, 0.5 mm. diam., usually 

 anastomosing and forming a net, yellow- 

 brown, blotched with crimson. Capilli- 

 tium-threads yellow, the calcareous plates 

 pale yellow. Spores violet-brown, mi- 

 nutely spinulose, 9 to 11 /x diam. 



Hab. On dead wood. Rare. 



Genus 6. CRATERIUM Trentepohl. 

 — Sporangia stalked, goblet-shaped or 

 ovoid, usually dehiscing with a distinct 

 lid ; sporangium - wall charged with 

 granules of lime, cartilaginous in the 

 lower part, thinner above. Capillitium 

 containing large lime-knots usually con- 

 fluent in the centre of the sporangium as 

 a pseudo-columella. 



1. C. pedunculatum Trent. — Sporan- 

 gia smooth, goblet-shaped, with a pale 

 lid. Capillitium with many large white 

 lime-knots. Spores violet-brown, nearly 

 smooth, 8 to 9 /x diam. 



Hab. On dead leaves. Common. 



2. C. leucocephalum Ditm. — Sporangia top-shaped or ovoid, 

 stalked, red-brown, white and mealy, with sprinkled yellow granules 



Fig. 14- 



Craterium pedunculatum 

 Trent. 



a. Two sporangia ; in one the 



lid has fallen away. Mag- 

 nified 10 times. 



b. Capillitium with lime-knots 



and two spores. Magnified 

 no times. 



