88 ENDOSPOREiE. [CHONDRIODERMA. 



wrinkled and irregularly reticulated, brownish-yellow ; the inner 

 colourless ; the large columella is filled with crystalline deposits 

 of lime. 



Hah. On fallen branches of O^wnfea.— Algiers (Durien). 



This description applies to a dark form of C. testaceum. 



22. C. Stahlii Rost., Mon., p. 185. Sporangia spherical, slightly 

 flattened at the base, either dull, brownish-white, or shining and 

 dull brown ; dehiscing either by a round central opening, or by 

 an oblong fissure, or irregularly ; stalk brown, shining ; columella 

 entirely wanting ; capillitium of dull violet threads 1-2 to 2-3 fx, 

 thick, at first simple, branching several times towards the tips, 

 but not uniting into a net ; spores pale violet, faintly waited, 

 9"2 fx diam. 



Hab. Near Strassburg (Dr. Stahl). 



This description suggests a form of O. radiatum, in which the 

 columella varies in shape and size. 



23. C. leptotrichum Racib., in Eozpr. Mat.-Przyr. Akad. 

 Krak., xii., p. 75 (1884). Sporangia vein-like, or irregular, 

 flattened ; sporangium-wall simple, covered with small calcareous 

 scales ; columella none ; capillitium of delicate threads 0-83 /x. 

 diam., forming a flaccid dense net, which can easily be drawn out 

 of the plasmodiocarp ; spores blackish-brown, 12'5 to 13"2 fx, 

 diam., minutely warted. 



Hah. Near Cracow, Poland. 



The scaly wall of this species suggests that it may be a plasmodiocarp 

 form of Didymium squamulosum. 



24. C. exiguum Eacib., in Hedw., xxviii., p. 118 (1889). 

 Sporangia minute, stipitate, 0'3 to 0'4 mm. diam., hemispherical, 

 flattened beneath, grey, iridescent ; stalk once or twice the height 

 of the sporangium, very slender, furrowed, narrower and curved 

 above, yellow, without deposits of lime ; sporangium-wall simple, 

 with little lime, persistent and yellow beneath, hyaline and 

 breaking irregularly above ; capillitium of slender hyaline threads 

 0"4 ju, wide, branched and anastomosing, expanded at the axils, 

 but without Ume deposits ; spores violet, minutely warted, 7 to 8 jw, 

 diam. Resembling certain species of Tilmadoche, of which it may 

 be a form with little lime. 



HaJ). On bark. — Near Cracow. 



The description applies to Physarum nutans v. violascens. 



25. C. simplex Schroeter, Krypt. Fl. Schles., iii., p. 123 (1885). 

 Sporangia globose, somewhat depressed, solitary ; sporangium- 

 wall simple, brittle, bright chocolate-brown ; columella wanting ; 

 capillitium radiating, repeatedly branched, violet ; spores violet, 

 smooth, 7 to 9 m diam. 



Hab. On old stumps. — Fiirstenstein, Silesia. 



