The Myxomycetes of the United States. 381 



viz. : Trichamphora and Scyphium, have been cancelled, 

 and two new genera added, which are indicated by an 

 asterisk (*). 



Sub-Division I. AMAUROSPOR^. 

 Section A. ATBICE^E (without capillitium). 

 Order I. Protodermese. 



Family 1. PEOTODEEMACEJ). 



Genus 1. Protoderma. 

 Section B. TBICHOPROBuE (with capillitium). 

 Order II. Calcarese. 



FAMILY2. CIENKOWSKIACE^l. 



Genus 2. Cienkowskia. 



FAMILY 3. PHYSARACE.E. 



Genus 3. Badhamia. 



" 4. Physarum. 



" 5. Fuligo. 



" 6. Craterium. 



" 7. Leocarpus. 



" 8. Crater iachea. 



" 9. Tilmadoche. 



FAMILY 4. DIDYMIACEJE. j 



Genus 10. CJwndrioderma. 

 " 11. Dklymium. 

 " 12. Lepidoderma. 



FAMILY 5. SPUMAEIACEJ!. 



Genus 13. Diachea. 

 " 14. Spumaria. 



Order III. Amaurochseteae. 



familyg.echinosteliacej;. 

 Genus 15. Echinostelium. 



FAMILY7. STEMONITACE^I. 



Genus 16. Lamproderma. 

 " 17. Comatricha. 



" 18. Stemonitis. 



FAMILY8. AMAUROCHilTACEJ:. 



Genus &% x Amaurochcete. 



FAMILY9. BREPELDIACEiB. 



Genus 20. Brefeldia. 



