190 THE MYXOMYCETES OF PICTOU COUNTY. MOORE. 



parts, or, in some cases, terminating abruptly at the apex of the 

 sporangium in an enlarged extremity which gives rise to a 

 number of branches. Interior scaffolding of the capillitium 

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

 uitis-like but discontinuous an 1 ueneraUy more fully developed 

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

 bifurcated. Spores violaceous grey by transmitted light, 

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

 these roughened, Avarted, or reticulated, 6 7.5/iin diameter. 



On decaying conifers. 



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

 stant spore character is the presence of the um'bo-like warts. I 

 have specimens 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, LAMPKODERME^E. 



This family is characterized by the capillitium being 

 developed chiefly or solely from the summit of tihe columella. 

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

 Lamproderma. 



Genus, Lamproderma II<>M. 



Sporangia distinct, stipitate. Stipe black. Capillitium 

 consisting of branched anastomosing threads radiating from the 

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

 cent and somewhat persistent, particularly at the base of the 

 sporangium. 



18. Lamproderma arcyrionema Host. Sporangia distinct, 

 gregarious, stipitate. Total height l mm or sligftitly exceeding 

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

 length. Diameter of expanded capillit inni about .5 mm . Peri- 

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

 Oolumolla reaching to about the middle of the spor- 



