TERICH/ENA.] 



BRITISH MYCETOZOA. 



39 



4. P. variabilis Rost. — Sporangia curved or netlike plasmodio- 

 carps, sometimes globose, scattered, yellow or umber ; outer layer 

 of sporangium-wall charged with dark, angular granules, and closely 

 combined with the membranous, minutely papillose inner layer. 

 Capillitium a profuse web of yellow threads, rough with minute 

 warts and constrictions. Spores yellow, nearly smooth, 10 to 13 /x 

 diam. 



Hab. On dead leaves, wood, etc. 



ORDER III.— MARGARITACEiE. 



Genus 33. MARGARITA Lister.— 

 Sporangia globose, with a translucent wall. 

 Capillitium a profuse coil of slender, 

 hair-like, scarcely branching threads. 



1. M. metallica Lister. — Sporangia 

 mostly solitary, pearl-grey or copper 

 colour, iridescent. Capillitium of very 

 long grey threads about 1 /* broad. 

 Spores almost colourless, nearly smooth, 

 10 to 11 /x diam. 



Hab. On dead leaves and rotten 

 planks. 



Fig. 41. 

 Margarita metallica Lister. 



a. Two sporangia. Magnified 

 6 times. 



b. Fart of a long capillitium 

 thread, and a spore. Mag- 

 nified 250 times. 



Genus 34. DIANEMA Rex. —Sporangia sessile ; sporangium- 

 wall membranous. Capillitium consisting 

 of nearly straight threads, slender at both 

 ends, attached above and below to the 

 sporangium- wall. 



1. D. Harveyi Rex. — Sporangia pul- 

 vinate or curved plasmodiocarps, 1 mm. 

 diam., dull red or bronze. Capillitium - 

 threads erect, simple except at the ends 

 where they are attached by several 

 branches to the sporangium-wall. Spores 

 pale yellowish, ochraceous or brick- red in 

 mass, nearly smooth, 8 to 10 /* diam. 



Hab. On dead wood. 



2. D. depressum Lister. Sporangia 

 pulvinate, depressed, 2 to 10 mm. wide, 



at first shining violet, maturing to grey-brown. Capillitium-threads 

 slender, rigid, forking and uniting at the opposite ends, attached 

 above and below to the sporangium-wall by suddenly acuminate 

 tips. Spores yellowish-grey, closely reticulate when highly magni- 

 fied, 6 to 8 /u. diam. 



Hab. On dead wood. 



Fig. 42- 

 Dianema depressu 



Lister. 

 Magnified 



Flasmodiocarp, 



twice. 

 Capillitium attached above 



and below to the walls of 



the sporangium. Magnified 



50 times. 

 Spore. Magnified 560 times. 



