GENERAL SYSTEMATIC BACTERIOLOGY 149 



a. If a genus includes but one species when originally published this species 

 is the type. 



b. When more than one species is included in the original publication of the 

 genus, the type is determined by the following rules (these rules are Articles 3 

 to 6 of the Report of the Committee on Generic Types published in (1) Science 

 N. S. 49: 334-33G. 1919, (2) Bot. Soc. Amer. Publ. 73, 70-71. 1919). 



Recommendations. In the future it is recommended that authors of generic 

 names definitely designate type species; and that in the selection of tj^pes of gen- 

 era previously published, but of which the type would not be indicated by the 

 preceding rules, the following points be taken into consideration. (This includes 

 Article 7, a to g, of the Report on Generic Types published in Science and in 

 Bot. Soc. Amer. Publ. 73, loc. cit.) 



Section 3. Rejection of Names 



Article 5. A name is rejected 



a. When preoccupied (homonym). 



1. A specific name is a homonym when it has been published for another species 

 under the same generic name. 



2. A generic name is a homonym when previously published for another genus. 



3. Similar names are to be treated as homonyms only when they are mere varia- 

 tions in the spelling of the same word; or in the case of specific names, when they 

 differ only in adjective or genitive termination. 



b. When there is an older valid name based on another member of the same 

 group (metonym). 



c. When there is an older valid name based on the same type (typonym). 



d. When it has not been effectively published according to the provisions of 

 Section 1 of these rules (hyponym). 



Article 6. There may be exceptions to the application of the principles and 

 rules of this Code in cases where a rigid application would lead to great confusion. 

 Such exceptions become valid when approved by the Nomenclature Commission. 



E. SUGGESTIONS AND RECOMMENDATIONS OF THE SOCIETY OF 

 AMERICAN BACTERIOLOGISTS 



The preiiminarj^ report of the Committee of the Society of American 

 Bacteriologists on Characterization and Classification of Bacterial 

 Types (Winslow, Broadhurst, Buchanan, Krumwiede, Rogers and 

 Smith 1917) suggested the following to the Society: 



We recommend to the Society of American Bacteriologists: 



a. That the International Rules for Botanical Nomenclature be accepted by 

 the Society as governing bacterial terminology, with the exception that French, 

 English or German may be substituted for Latin in the diagnosis. 



b. That the date of publication of the third edition of Zopf's Spaltpilze be 

 considered as the date for the beginning of bacteriological nomenclature for the 

 purpose of determining priority, with the exception of a list of genera conservanda 

 to be adopted by the Society at its 1918 meeting. 



