212 A Monograph of the Myxogastres, 



Closely allied to Chondrioderma testaceum, if indeed it is more 

 than a geographical variety. Sporangia flattened, umbilicate 

 above, frequently dehiscing in a circumscissile manner. 



_, . , , ,.. , 



Chondrioderma mutaDile, Schroeter. 



. 



Sporangia sessile, deformed, hemispherico-depressed, or elongated 

 and curved, reniform, semicircular, &c., 1 3 p long, 1 mm. 

 broad, hard, fragile, bright, greyish-brown; columclla well de- 

 veloped, same shape as the sporangium, bright rufous-brown; 

 threads of capitulum thin, violet, here and there thickened in 

 a nodulose manner; spores globose, 11 14 /x diameter, blackish- 

 violet, mucronulate. 



Chondriodcrma mutabile, Schroeter, Kr. Fl., p. 123; Sacc., 

 Syll., 1273. 



On rotten wood. Silesia. 



Chondrioderma fallax. Host. . 



Sporangia spherical, sessile, yellowish-white, seated in numbers, 

 but not crowded, on a distinct common hi/pothallus ; columella 

 either minute and flattened, or of medium size and ovate; threads 

 fasciculate for some distance then branching copiously, obscure 

 violet; spores obscure violet : warted, 12 14 /x diameter. 



Chondi&derma fallax, Host., Mon., p. 171 ; Sacc., Syll., no. 

 1261. 



Salzburg, Tyrol. 



7)'. Columella absent. 



Chondrioderma difforme, Rost. (figs. 35 38).^*^ 



Sporangia sessile on a broad base, convex, circular or irregularly 

 elongated, outer wall snow-white, rather thick, breaking away 

 in patches, inner wall separated from the outer by a space 

 containing air, thin, without lime, brownish-ochre, sometimes 

 iridescent ; mass of spores blackish ; columella absent or repre- 

 sented by a small accumulation of lime at base of sporangium, 

 which is covered by the inner wall ; capillitium scanty, some- 

 times almost obsolete, threads springing from base of sporangium, 



