254 A Monograjih of the Mijxogastres. 



ated upwards, brownish rust colour or dingy ochre, wrinkled 

 longitudinally ; columella hrown, globose or hemispherical ; 

 threads of capillitium thin, brownish-violet, branches forming 

 acute angles, sometimes united laterally ; spores globose, brown- 

 ish-purple, minutely wartcd, 10 — 13 /x diani. 



Host., Mon., p. 187, figs. 159, 160; Cooke, Myx. Brit., p. 44, 

 figs. 159, 160; Sacc, Syll., vii., p. 386. 



On mosses, wood, &c, Britain (Teesdale, Yorks. side ; New 

 Pitsligo) ; France ; Germany ; Finland ; Sweden ; Ceylon. 



Superficially resembling Lepidoderma stcllata before dehi- 

 scence, but known at once by the warted spores, which also 

 separate the present species from L. fulva. 



Scattered or gregarious, 2 — 2'5 mm. high, the base of the 

 stem expanding into a small, irregular hypothallus. Threads 

 of capillitium sometimes with slight granular swellings. 



(Rostafinski's Synonyms.) 

 Didymmm tigrinum, Schrad., t. 6, f. 2, 3 (1797) ; B. and Br., 



N. H., 383; Cke., Hdbk., n. 1121. 

 Physarum tigrinum, Pers., Syn., 174 (1801); FL, Dan., t. 



1434, f. 2. 

 Physarum squamulosum, Pers., Syn., 174 (1801). 

 Trichia tigrina, Poir., Ency., viii., 53. 

 Tricliia squamidosa, Poir., Ency., viii., 53. 

 Cionium tigrinum, Lk., Hdbk., iii., 410 (1833). 

 Didymium riijijjes, Fr., S. M., iii., 116 (1829). 

 Leangium squamulosum, Fr., Stirp. Femsj., 13 (1825). 



Lepidoderma obovatum, Mass. (n. sp.) (figs. 45 — 47). 



Broadly obovate, stipitate ; wall dirty ochraceous, thick and 

 firm, studded with large, innate whitish patches of lime ; stem 

 short, thick, dark hrown, wrinkled ; mass of spores blackish with 

 purple tinge; columella absent; capillitium springing from the 

 base of the sporangium, threads dingy violet, 3 — 4 /^ thick, 

 equal, repeatedly branching in a dichotomous manner, furnished 

 with a sioelling at the base of each dichotomy, the whole com- 



