LIXNEAN SOCIETY OF LONDON". 55 



Cyanophyceae. Bornet & Flahault, Revision des Nosto- 

 cacees heterocystees, 1880-S ; and Gomont, Monograpliie 

 des Oscillariees (Nostocacees homocystees), 1892-3. 

 Diatomacea?, Chroococcaceae, and Flagellatea) were postponed 

 till the next Congress. 



Fungi. 



Fries, Systema Mycologicuui, 1821-1832 ; with the followiug 

 exceptions : — 



Uredineie, Ustilagineae, and Gasteromycetes, which start 

 from Persoon, Synopsis Fungorum, 1801. 



Lichens. 

 Linnteus, Species Plautaruin, 1753. 



MrXOMYCEXES. 



Linnaeus, Species Plantarum, 1753. 



Committees were appointed to prepare lists of ' genera conser- 

 vanda ' for the AlgcB, Fungi, and Lichens. 



For Fungi with a pleomorphic life-cycle, it was decided to 

 adopt the oldest name applied to the perfect stage of the fungus, 

 provided that in other respects it conform to the rules. 



Mr. E. A. N. AiiBEE not being present, and no delegate having 

 been present at the Section on Pliytogeographical Nomenclature 

 (admirably summarised in the ' New Phytologist,' ix. uos. 6 & 7, 

 pp. 2G0-262), Dr. Stapf resumed his address, stating that: — 



The propositions concerning fossil plants led in one particular 

 point to a somewhat lively discussion. This was with respect to 

 the admission of diagnoses or descriptions not in Latin, but in 

 one of the four modern tongues, Euglish, French, German, or 

 Italian. It was in the end decided that descriptions of fossil 

 plants might be in a modern language, but they should always be 

 accompanied by a Latin diagnosis. As starting-point Linuseus's 

 ' Species Plantarum,' 1753, was adopted for fossil plants; but in 

 order to reduce the changes arising from that rule to a minimum, 

 a list of ' nomina conservanda ' will have to be drawn up, including 

 generic names of living plants which otherwise — as, for instance, 

 BucJdandia — would have to give way to old generic names of 

 fossil plants, and generic names of fossil plants which are homo- 

 nyms of synonyms of recent plants. 



