MYXOGASTRES. 307 



75. DIDYMIUM, Schrad. 

 Peridiuin scaly or floccose, bursting irregularly. 



1. melanopus,i^/-.(«o.382),aiidy3clcivus(«o.ll0). On various substances. 



2. heraispliyericum, Fr.; Sow. t. 12. On dead twigs, etc. 



3. furfuraceum, Fr. {no. 734). On dead leaves. 



4. tigrinum, Fr.; Schrad. t. Q.f. 2, 3 ; {no. 3S3). On decayed wood. 



5. squamulosum, A. and S. ^. 4./. 5. On dead leaves, etc. 



6. farinaceum, Fr.; Schrad. t.h.f.%. On dead leaves, etc. 



7. nigripes, Fr. ; Ditni. t. 42. On rotten wood. 



8. pertusmn, B. Fng. Ft. I. c. }). 313. On dead herbaceous stems. 



9. xanthopus, Fr.; Bitm. t. 43 ; {no. 111). On dead leaves. 



10. leucopus, Fr. ; Lk. Diss. i. p. 27. On dead leaves, etc. 



11. Sowerbeii, B. ; Sow. t. 412./. 3. On a decaying bulb. 



12. lobatum, Nees, Syst.f. 104. On mosses. 



13. congestum, B. and Br. {no. 384). On dead leaves, grass, etc. 



14. daedaleum, B. and Br. {no. 385). In a cucumber-frame. 



15. physaroides, Fr. On dead wood, mosses, etc. 



16. cinereum, Fr. ; BatscJi,/. 169. On various decaying substances. 



17. serpula, Fr. On dead leaves. 



76. PHYSARUM, P. 



Peridium simple, membrauaceous, very delicate, naked, 

 quite smooth, bursting irregularly. Columella none. 



1. nutans. P., and y am'eum, Grev. t. 124. On decayed wood. 



2. bulbiforme, Schum.; Fl. Ban. t. 1974./. 3. On rotten wood. 



3. rubiginosmn, Chev.; Fl. Par. p. 338. On bark, amongst moss. 



4. lilacinum, Fr. {no. 215). On decayed wood. 



5. metallicum, B. {no. 29, with a figure). On elder-sticks. 



6. album, Fr.; Grev. t. 40. On dead leaves, etc. 



7. atiaun, Fr. {no. 216). On fallen oak-branches, etc. 



11. AISTGIORIDIUM, Grev. 



Peridium membranaceous, opening by a longitudinal fis- 



X 2 



