138 A Monograph of the Myxogastres. 



Differs from the typical form in the smaller size of the 

 sporangium and longer stem. 

 United States. 



Lachnobolus Rostafinskii, Kuril). 



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

 grey, lower portion of sporangium with a distinct membrane, 

 hemispherico-patelliform, the upper portion destitute of a mem- 

 brane; capillitium well-developed, forming a net adnate to 

 the peridium by numerous branches, the upper portion with 

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

 forming a reticulation, varying from 4*2 8*2 p. diameter ; spores 

 yellow, membrane jinn, smooth, 7'5 8*3 /a diameter. 



Lachnobolus Rostafinslcii, Racib., Myx. Cracov., p. 12, fig. 6; 

 Sacc., Syll, n. 1482. 



Very closely allied to Lachnobolus glolosus. 



Poland. 



Lachnobolus arcyrella, Rost. 



Sporangia piriform, fulvous or almost straw-coloured, stem as 

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

 not elastically extruded, forming a lax irregular network, threads 

 2'5 8'3 m diameter, attached at many points to the sporangial 

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

 mented with numerous obtuse, small warts ; spores smooth, 7 8 ft 

 diameter. 



Lachnobolus 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 brown, smooth, shining, dehiscing irregularly ; mass of 

 spores jtesh-col&ur ; threads of capillitium combined to form a 

 dense net; 4 5 p thick, ornamented with warts and short, 



