36 BRITISH MYCETOZOA. [Hemitrichia. 



Genus 29. HEMITRICHIA Rostafinski. — Sporangia stalked or 

 sessile ; capillitium an elastic network of 

 branching threads thickened with spiral 

 bands. 



1. H. rubiformis Lister. — Sporangia 

 subcylindrical, crowded, or in clusters of 

 6 to 12, with crumpled, membranous, 

 empty stalks, red-brown or olive-black. 

 Capillitium-threads orange-red, with 3 to 

 Fig/37. 5 regular spiral bands, strongly spinose. 



Hemitrichia rubiformis Spores pale orange-red, minutely warted, 



a. Cluster of sporangia. Mag- 10 r 1 diam. 



nified 2J times. Hab. On dead wood. 



Capillitium. Magnified 2S0 



c. Spore!' Magnified 400 times. 2. H. intorta Lister. — Sporangium 



turbinate, yellow, on a short, dark, solid 

 stalk. Sporangium -wall granular, the inner layer usually smooth. 

 Capillitium-threads orange-yellow, twisted, spinulose, with 4 or 5 

 close, more or less distinct, spiral bands. Spores yellow, minutely 

 warted, 10 /a diam. 



Var. leiotricha. — Spirals on elaters indistinct or nearly wanting. 

 Spores 12 to 13 /* diam. 



Hab. On dead wood and leaves. 



3. H. clavata Rost. — Sporangia turbinate, stalked, shining, 

 ochraceous-yellow. Stalk cylindrical, dark, hollow, filled with spores. 

 Capillitium-threads yellowish-olive, with 5 or 6 well-defined bands 

 arranged in an elongated spiral. Spores ochraceous, minutely 

 warted, 8 to 10 /a diam. 



Hab. On dead wood. 



4. H. Karstenii Lister. — Sporangia curved or branched plas- 

 modiocarps, or globose. Except that the capillitium-threads are 

 combined into a network, this species agrees with Trichia conlorta. 



Hab. On dead wood. 



5. H. Serpula Rost. — Plasmodiocarps winding or forming a net, 

 golden yellow. Capillitium-threads yellow, with 3 to 5 well-marked 

 spiral bands, strongly spinose. Spores yellow, 10 to 12 /a diam., 

 reticulate with narrow bands, giving a border 1 ai diam. 



Hab. On dead wood. 



6. H. chrysospora Lister. — Sporangia subglobose, sessile, 

 crowded, bright yellow. Capillitium-threads yellow, with 4 or 5 

 close spiral bands. Spores yellow, 14 to 18 ai diam., neatly reticu- 

 lated with deep, narrow bands, giving a border 1 or 2 ai wide. 



Hab. On fallen larch. Rare. 

 A form occurs with free elaters. 



