DiDERMA 103 



Plasmodium opaque white (Lister). Sporangia scattered or 

 somewhat clustered, sessile, subglobose, depressed, 0.6 to 1 mm. 

 diam., smooth, ochraceous, pinkish, or brownish red; sporangial 

 wall of two layers, the outer cartilaginous, thin, brittle, glossy, 

 charged with innate lime-granules, separating from the membra- 

 nous inner layer. Columella hardly evident, a rugose thickening 

 of the brownish red base of the sporangium. Capillitium consist- 

 ing of rather scanty, flaccid, sparingly branched, colorless or pale 

 violet threads 2-4 n broad, persistent at the base. Spores dark 

 violet-brown, spinulose, 10-16 /x diam. 



Type locality: Austria. 



Habitat: On mosses and mossy logs. 



Distribution: *Maine, New Hampshire, New York, Penn- 

 sylvania, Quebec. 



Illustration: Lister, Mycetozoa ed. 3. pi. 96. 



This species is very rare. American specimens are usually 

 wrinkled because of the separation of the two walls, and pale 

 ochraceous in color. The developments are small and may be 

 easily mistaken for imperfect phases of D. effusum. The pale, 

 scanty capillitium, and larger, darker, rougher spores distinguish 

 the form from D. ochraceum. 



13. Diderma ochraceum Hofl^m. Deutsch. FI. Crypt, pi. P, 

 fig. 2b. 1795. 



Plasmodium lemon-yellow (Lister). Sporangia scattered or 

 in small clusters, sessile, hemispherical or subglobose, 0.4 to 1 mm. 

 diam., often forming curved and sometimes ring-shaped plasmo- 

 diocarps, ochraceous, rarely pale red; outer sporangial wall some- 

 what cartilaginous, with abundant deposits of angular or round, 

 yellow lime-granules, adhering to or free from the firm, mem- 

 branous, yellow, inner one. Columella indefinite. Capillitium 

 consisting of abundant, simple or branching, purplish brown 

 threads, often hyaline at the base. Spores purplish gray, min- 

 utely spinulose, 9-11 ^i diam. 



Type locality: Germany. 



Habitat: On mosses, or mossy logs and rocks, in wet places. 



Distribution: *Massachusetts, Pennsylvania, Quebec, Ten- 

 nessee. 



Illustration: Lister, Mycetozoa ed. 3. pi. 95. 



Another species that has been found rarely in North America. 

 It seems to appear from late August until November. Mr. 



