202 A Monograph of the Myxogastres. 



thick, irregularly rugulose, expanding at the base into a small 

 hypothallus, pale ocliraceous ; columella cylindraceo-clavate, nearly 

 half the height of the sporangiunt, smooth, pallid ; mass of spores 

 blackish-violet; capilUtium copious, threads dingy lilac, 3 — 3*5 fx, 

 thick at the base, tapering, branching irregularly and anasto- 

 mosing laterally, furnished with numerous elongated swellings 

 usually containing a few dark granules; spores globose, deep 

 violet, almost opaque, coarsely wartcd, 13 — 15 /x diameter. 



On thin decorticated twigs. Fort Colville, Canada. (Dr. 

 Lyall.) 



(Type in Herb., Kew.) 



From 1'5 — 2 mm. high, with the habit of Chondrioderma 

 Oerstcdii, differing in the highly developed columella and irregular 

 mode of dehiscence. 



Chondrioderma Carmicliaelianum, Cooke (figs. 245 — 247). 



Sporangia S23hcrical, quite sessile, splitting when mature into 

 4 — 5 acute segments, pale red, polished ; columella s])herical, 

 attenuated at the base, jJale red ; threads of capillitium very thin, 

 colourless, branching in a dichotomous manner, here and there 

 laterally connected ; spores globose, dark- violet, smooth, 11 — 13 /n 

 diameter. 



Chondrioderma Carmiehaelianum, Cooke, Myx. Brit., p. 42. 



Chondrioderma radiatum, Rost., Mon. Append., p. 40 (in 

 part) ; Sacc, Syll, 1284 (in part). 



Diderma Carmiehaelianum, Berk., Eng. FL, vol. v., p. 34; 

 Cooke, Hdbk., no. 1112. 



(Type in Herb. Berk., Kew.) 



On moss. Britain (Appiu, N. B. ; Trifreu, Wales). 



Sporangia about '5 mm. diameter; distinguished from C. 

 radiatum in being sessile and globose, not umbilicate below, 

 and in the smooth spores. 



Chondrioderma Trevelyana, Rost. 

 Sporangia ovate or subglobose, sessile, wall single, polished 

 ivory coloured, sjdiUinf/ half way to the hase into numero^ts 



