The Myxomycetes of the Miami Valley, Ohio. 



153 



saruin, Fuligo, and Spumaria; to the latter, Cribraria, Diety- 

 dium, and Licea. The first subdivision, should it be neces- 

 sary, can be separated again into several sections by the di- 

 versity of the capillitium. 



In this essay Schrader proposes four new genera of the 

 Myxomycetes — Cribraria, Dictydium, Licea, and Didymium. 

 Each genus is carefully defined, and the species belonging to 

 it known to him described and illustrated. 



The Synopsis Methodica Fungorum of Persoon appeared 

 .in 1801. It was the next most important treatise upon the 

 Fungi after that of Micheli. In this work the Fungi are 

 divided into two classes, six orders, and seventy-one genera. 

 The Myxomycetes are contained in eleven genera of third 

 order Dertnatocarpi. Nine of the genera belong to the first 

 section Trichospermi, which includes, also, the puff-balls, and 

 two of the genera are included in the second section 

 Gymnospeimi, which contains, also, Mucor, Puccinia, etc. 

 Persoon described 79 species, and their distribution in the 

 11 genera may be shown, as follows: 



ORDER IIL DERM ATOCARPI. 



§1. TRICHOSPERMI. 



Genus 19. Lycogala. 

 1. E. argentea ; 2. h. turbinata; 3. L. punctata; 4. L,. 

 miniata; 5. L,. conica. 



Genus 20. Fueigo. 

 1. F. rufa; 2. F. violacea; 3. F. laevis ; 4. F. flava ; 5. 

 F. vaporaria; 6. F. Candida. 



Genus 21. Spumaria. 

 1. S. mucilago ; 2. S. physaroides. 



Genus 22. Diderma. 

 1. D. floriforme ; 2. D. stellare ; 3. D. umbilicatum ; 4. D. 

 vernicosum; 5. D. (?) ramosum ; 6. D. ochraceum ; 7. U. 

 contortum ; 8. D. testaceum ; 9. D. globosum ; 10. D. dif- 

 forme ; 11. D. complanatum. 



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