190 THE MYXOMYCETES OF PICTOU COUNTY. — MOORE, 



parts, or, in some cases, torminatiiig abruptly at tlie apex of the 

 sporangiimi in an enlarged extremity -which gives rise to a 

 number of branches. Interior scaffolding of the capillitiuin 

 dense, of stout purplish brown threads. Peripheral net stemo- 

 nitis-like but discontinuous and generally more fully developed 

 towards the base of the sporangium. Free ends common, often 

 bifurcated. Spore-; violaceous grey by transmitted light, 

 marked with a few scattered, umbo-like warts^ the areas between 

 tihese roughened, M-arted, or reticulated, 6 — 7.5/xin diameter. 



On decaying conifers. 



This appears to be a very variable species. The only con- 

 stant spore (diaracter is the jiresence of the unlbo-like warts. I 

 have specimcais in which the surface between these is beautifully 

 reticulated, others in which it is roughened, and still others 

 where it is minutely warted. The extent to which a peripheral 

 net. is developed is also subject to great variation. 



Family, LAMPEODERME^. 

 This family is characterized by the capillitium being 

 developed chiefly or solely from the summit of tlie columella. 

 It is represented in my collections by but one species of the genus 

 Lamproderma. 



Genus, Lamproderma Eost. 



Sporangia distinct, stipitate. Stipe black. Capillitium 

 consisting of branched anastomosing threads radiating from the 

 upper part of the columella. The peridiirm is shining, irides- 

 cent and somewhat persistent, particularly at the base of the 

 sporangium. 



18. Lamproderma arcyrionema Rost. — Sporangia distinct, 

 gregarious, stipitate. Total height 1""" or sligftitly exceeding 

 this. Stipe relatively long, tapering upward about .6""" in 

 length. Diameter of expanded ea])illitium about .S""". Peri- 

 dium falling away except at the base where it persists as a 

 collar. Columiella reaching to about the middle of the spor- 



