142 THE MYXOMYCETES 



2. Lepidoderma chailletii Rost. 



Mon. 189. 1875. 



1911. Lepidoderma carestianum Rost. var. chailletii (Rost.) List., Mycetozoa 

 ed. 2. 140. 



Sporangia subglobose or pulvinate, or forming short plasmodiocarps, 

 crowded and more or less coalescent, or merely gregarious, large, 

 1-1.5 mm. broad, drab or dull gray, sparsely sprinkled with white 

 tetrahedral or irregular scales; peridium thin, more or less translu- 

 cent, rugulose, dull brown or yellowish, persistent; columella clavate 

 or scarcely developed; capillitium abundant, under the lens purple- 

 brown, sparingly branched, even, slender, without calcareous deposits 

 or vesicles; spores minutely warted, fuliginous, 10-13 /*. Plasmodium 

 dirty white. 



Similar to L. carestianum, but differing in the size and habit of the 

 sporangia, in the more uniform capillitium and in the size, color and 

 surface characters of the spores. 



Washington, California; Europe. 



3. Lepidoderma granuliferum (Phill.) R. E. Fr. 



Arkiv for Bot. 6 (7) : 3. 1906. 

 PI. X, Figs. 214, 215, 216. 



1877. Didymium granuliferum Phill., Grev. 5 : 114. 



1891. Amaurochcete minor Sacc. & Ell., Michelia 2 : 566. 



1892. Badhamia granulifera (Phill.) Massee, Mon. 321. 



1911. Lepidoderma carestianum (Rabenh.) Rost. var. granuliferum Lister, 

 Mycetozoa ed. 2. 140. 



Sessile, plasmodiocarpous, the peridium dark, covered with dull 

 cinereous scales, appearing light drab under lens; columella small, 

 dark; capillitium rough, dark or pale and often with vesicular expan- 

 sions at the axes, which enclose calcareous deposits; spores clear brown, 

 rather sparsely covered with distinct dark warts, 15-20 n in diam- 

 eter. 



A puzzling form, very variable, and undoubtedly approaching 

 L. carestianum, but apparently differing constantly in the very large 

 spores. The marking of the latter differs from the marking on the 

 spores of carestianum in that the warts are longer and more slender, 

 more spinulose. Lister emphasizes the calcareous inclusions in the 

 capillitium, but this feature seems to be inconstant. Phillips' original 

 description gives the spore measurements as 22-25 n, larger than in 

 any of the material so referred in our collection. Harkness No. 35, 



