204 A Monograph of the Myxogastres. 



thickenings ; spores globose, violet, densely covered with minute 

 warts, 10 — 14 [x diameter. 



Chondrioderma Oerstedtii,'Ro?,i., '^low., p. 184, figs, 154, 157; 

 Cooke, Brit. Myx.,' p. 41, figs. 154, 157; Sacc, Syll., 1286; 

 Grev., vol. v., p. 12. 



(Specimen named by Rostafinski in Herb. Berk.) 



On wood, &c. Britain (Jedburgh) ; Germany. 



I have not been able to observe the glistening glassy warts 

 described by Rostafinski as present on the sporangium. Dis- 

 tinguished from G. radiatum by the absence of columella, and 

 from G. Garmicliaelianwm in the presence of a stem. 



Chondrioderma lucidum, Cooke. 



Sporangia subglobose, sessile, either scattered or crowded, 

 splitting in an irregular stellate manner, bright reddish-yellow ; 

 internally yellow, mass of spores globose ; capillitium brown, 

 irregular at the points of ramification, yellowish, spores globose, 

 violet-black, "0125 mm. ( = 12 jn) diameter, minutely echinulate. 



Ghondrioderma lucidum, Cooke, Myx. Brit., p. 42; Sacc, 1288. 



Diderma lucidum, B. and Br., Ann. Nat. Hist., n. 938, t. 15, 

 fig. 9; Cke., Hdbk., n. 1110. 



On moss and Jungcrmannia. Britain. 



I have seen no specimen of the present species. 



According to Berkeley's figure the sporangium is sometimes 

 furnished with a short, distinct stem thickened upwards, the 

 sporangium may be spherical or considerably depressed; after 

 dehiscence the basal portion is persistent with an irregularly 

 toothed margin; an "obscure columella" is also present. May 

 not this be a form of G. o'cidiatum ? 



Sub- Gen. Ghondrioderma. Spora7igium irregularly ruptured. 



A. Golumclla present. 



Chondrioderma Michelii, Rost. (fig. 312). 



Sporangia springing from a well-developed more or less torn 

 hypothallus, stipitate or almost sessile, circular in outline, 



