240 Mycetozoa of North America 



enclosing the spores, orange-red. Stalks membranous, 0.2 to 

 1 mm. high, usually combined in clusters of from six to twelve, 

 furrowed and rugose, red, not enclosing spore-like cells. Capilli- 

 tium red or orange-red in mass, consisting of twisting, sparingly 

 branched, orange-red, sinistrally winding threads 5-6 ^i diam., 

 with few pointed free ends, marked with three to five regular, 

 spiral bands, and studded with numerous, scattered spines, 2-5 n 

 long, rarely nearly smooth. Spores pale orange-red, warted, 

 10^12 fi diam. (Plate 13, fig. 5.) 



Type locality: Germany. 



Habitat: On dead wood. 



Distribution: Common, and usually abundant, throughout 

 North America. 



Illustration: Lister, Mycetozoa ed. 3. pi. 166. 



2. Hemitrichia intorta Lister, Mycetozoa 176. 1894. (N. Y. 

 B. G. no. 12648, authentic material.) 



Hemiarcyria intorta Lister, Jour. Bot. 29: 268. 189L 



Hemiarcyria longifila Rex, Proc. Acad. Nat. Sc. Phila. 1891: 396. 1891. 



Plasmodium watery white (Lister). Total height 1 to 1.5 

 mm. Sporangia stalked, gregarious or scattered, turbinate, 0.3 

 to 0.7 mm. diam., shining orange-yellow; sporangial wall mem- 

 branous above, thickened with granular deposits towards the base, 

 which persists somewhat as a cup, the wall papillose on the inner 

 side. Stalk thickened above and below, furrowed, 0.5 to 0.7 

 mm. long, 0.15 mm. thick in the middle, glossy purplish brown, 

 opaque, without spore-like cells. Capillitium consisting of two 

 or three long, orange-yellow threads, looped and attached at both 

 ends to the base, sparingly connected by branches, and twisted 

 throughout to form a dense, tangled mass; the threads marked 

 with four or five closely set, sinistral spiral bands, sometimes 

 connected by longitudinal striae, and densely spinulose. Spores 

 yellow, minutely warted, 8-10 n diam. 



Type locality: England, 



Habitat: On dead wood. 



Distribution: *Iowa, Massachusetts, Ohio, Ontario, *Penn- 

 sylvania. 



Illustration: Lister, Mycetozoa ed. 3. pi. 172, figs, a, b. 



An interesting species because of its peculiar capillitium, but 

 extremely rare. The threads are up to 8 cm, or more long from 



