138 A Mono<jraph of the Mi/dcoydstres. 



Ditfers from the typical form in the smaller size of the 

 sporangium and longer stem. 

 United States. 



Lachnobolus Rostafinskii, Racib. 



Sporangia stipitate, ovate-conoid, apex rounded, ycllcnoish- 

 grcy, loivcr 2^ortion- of sporangium with a distinct mcrtibranc, 

 hemispherico-patelliform, the npi^cr ^Jor^io?i destitute of a mem- 

 hrane , capillitium well-developed, forming a net adnate to 

 the peridium by numerous branches, the itijper portion tvith 

 numerous free Lranches ; threads with thin, plate-like processes 

 forming a reticulation, varying from 4*2 — 8'2 ju. diameter ; spores 

 yellow, membrane firm, smooth, 7"5 — 8-3 /x diameter. 



Lachnoholus Bostafinskii, Racib., Myx. Cracov., p. 12, fig. 6; 

 Sacc, Syll, n. 1482. 



Very closely allied to Lachnoholus glohosus. 



Poland. 



Lachnobolus arcyrella. Rest. 



Sporangia 2Jiriform, fulvous or almost straw-coloured, stc7n as 

 long as sporangium, or slightly shorter, sub-gilvous ; capillitium 

 not elastically extruded, forming a lax irregular network, threads 

 2-5 — 8'3 II diameter, attached at many points to the sporangial 

 wall, sometimes descending into the hollow of the stem, orna- 

 mented with numerous oUitse, small vmrts ; spores smooth, 7 — 8 ^ 

 diameter. 



Lachnoholus arcyrella, Rost., Mon., p. 431 ; Sacc, Syll., vii., 1, 

 n. 1480. 



Jutland. 



Lachnobolus incarnatus, Schroet. 



Sporangia when free globose or elongated, sessile, usually 

 clustered and forming a plasmodiocarp, wall thin, brittle, pinkish, 

 becoming hroiun, smooth, shining, dehiscing irregularly ; mass of 

 spores flesh-colour ; threads of capillitium combined to form a 

 dense net ; 4 — 5 /x thick, ornamented ivith warts and short, 



