120 GENERAL SYSTEMATIC BACTERIOLOGY 



The committee on classification of the Society of American Bacteri- 

 ologists has suggested that the publication of the third edition of 

 Zopf's "Die Spaltpilze" in 1885 be made the point of departure. Unex- 

 pected difficulties in the utilization of 1885 as the point of departure 

 have arisen. It seems probable that the least confusion will eventually 

 develop if 1753 be regarded as the date of departure. 



Article 20. However, to avoid disadvantageous changes in the nomenclature 

 of genera by the strict application of the rules of nomenclature, and especially 

 of the principle of priority in starting from the dates given in Article 19, the rules 

 provide for lists of names which must be retained in all cases. These names are 

 by preference those which have come into general use in the fifty years following 

 their publication, or which have been used in monographs and important floristic 

 works up to the year 1890. For the use of paleobotanists two lists are provided 

 (1) A list of generic names validly published and generally accepted, although 

 they come into conflict with paleobotanic names which are older. (2) A list of 

 generic names of fossil plants, validly published and generally accepted when 

 they come into conflict with older homonyms of living plants which have been 

 discarded into synonymy. In order to avoid using these names anew, these lists 

 are given in an appendix to the rules of nomenclature. 



Comments. Two lists of generic names have been proposed for 

 eventual submission to an International Botanical Congress for use in 

 bacteriology. The first of these was published by Vuillemin (1913) 

 and is as follows : Planococcus, Streptococcus, Klebsiella, M crista, Plano- 

 merista. Neisseria, Sarcina, Planosarcina, Metahacterium, Clostridium, 

 Serratia, Bacterium and Spirillum. 



In 1916 the following list of genera was proposed to the Society of 

 American Bacteriologists by its committee on classification. These 

 names were to be considered for two years before a vote should be taken 

 upon them. The list is as follows: Methanomonas, Carboxydomonas, 

 Hydrogenomonas, Mycoderma, Nitrosomonas, Nitrobacter, Azotobacter 

 Rhizobium, Nocardia, Actinomyces, Mycobacterium,, Corynebacterium, 

 Fusiformis, Leptotrichia, Pseudomonas, Vibrio, Spirillum, Neisseria, 

 Streptococcus, Staphylococcus, Albococcus, Micrococcus, Sarcina, Rhodo- 

 coccus, Bacterium, Erwinia, Pasteurella, Hemophilus, Lactobacillus, 

 Bacillus, Clostridium. More recent study shows that probably this 

 list should be revised. 



Section 3. Nomenclature of the different kinds of groups 

 Subsection 1. Names of groups above the family 



Recommendations. The following suggestions as to the nomenclature of 

 groups of higher rank than the family will tend to clearness and uniformity. 



