218 A Monograph of the Myxogastres. 



Chondriodenna calcareum, Rost. ^' 



cowvaT\;\*i \-i 



Sporangia sessile and variable in form, ovate, elongated and 

 curved, &c., convexo-depressed, glaucous and hyaline when 

 moist, opaque and reddish or pale when dry, very fragile, at 

 length rupturing irregularly, leaving a brown impression of the 

 base after falling away; spores 9 11 p. diameter, mixed with 

 a few black threads. 



Chondrioderma calcareum, Host., in Fckl. S. Myc., 2 Nch., 

 p. 74; Rost, Mon., p. 179; Sacc., Syll., 1280; Schroeter, p. 124. 



On diy stems. Germany. 



(Rostafinski's Synonyms.) 



Leocarpus calcareus, Link, Diss. I., 1. c., p. 23 (1809). 

 Diderma liceoides, FT., 1. c., in., p. 107 (1829). 

 Diderma clialyleum, Wein., 1. c., p. 592 (1836). 

 Diderma deplanatum, Fckl., S. M., p. 341 ; Non. Fr. (1869). 

 Chondrioderma calcareum, (Lk.) in Fckl., S. M., ii., Nch., p. 74 

 (1873). 



Chondrioderma Stahlii, Rost> 



SporSngia spherical, slightly flattened below, either dull 

 whitish-brown or shining and dingy brown ; dehiscing by a 

 central pore, a long slit, or irregularly; stem brown, shining; 

 columella absent ; threads of capillitium either simple or more 

 or less repeatedly bifurcate above, net combining to form a 

 network ; spores pale violet, minutely verruculosc, 9 fx diameter. 



Chondrioderma Stahlii, Rost., Mon., p. 185, f. 168; Cooke, 

 Brit. Myx., fig. 168; Sacc., Syll., 1287. 



Germany. 



DIDYMIUM, Schrad. (in part). 



Sporangia stipitate or sessile, wall single or double, surface 

 covered with lime, either in the form of a pulverulent stratum 

 of amorphous particles or crystals, or compacted into a granular 

 (but not porcelain-like) crust; columella present or absent; 



