l^fORTE AMERICAN PALEONTOLOGY FOE 1886. 



Bv Joiix Belknap Marcou. 



Trauslatioii of a portion of tlie resolutions concerning nomenclature 

 and colors voted by tbe International Geologic Congress at tlie meet- 

 ings of tlie 27tli, 2Stli, 29tli, 30tb of September and 1st of October, 1881. 

 (Extracted from the '' Compte rendu de la 2mc Session, Bologne, 1881, 

 Congres Geologique International, p. 198.'') 



RULES TO BE FOLLOWED IN ORDER TO ESTABLISH THE NOMENCLAT- 

 URE OF SPECIES. 



1. The nomenclature adopted is that in which each being is desig- 

 nated by a generic and a specific name. 



2. Each of these names is composed of a single Latin or Latinized 

 word, written according to the rules of Latin orthography. 



3. A species may present a certain number of modifications, con- 

 nected together in time or space, and designated respectively under 

 the name of Mutations or of Varieties ; modifications having a doubt- 

 ful origin are simply called Forms. Modifications will be indicated, 

 when necessary, by a third term preceded, according to each case, by 

 the words variety, mutation, or form, or by the coiresponding abbrevi- 

 ations. 



4. The specific name should always ba defined by indicating tlie 

 name of the author who established it ; this author's name is placed in 

 parenthesis when the primitive generic name is not kept, and in this 

 case it is useful to add the name of the author who changed the generic 

 reference. The same process is applicable to varieties wlien elevated 

 to species. 



5. The name attributed to each genus or to each species is that under 

 which they have been designated the longest on condition that the 

 characters of the genus and of the species shall have been published 

 and clearly defined. Priority will not go back beyond Linniieus, twelfth 

 edition, 1766. 



6. In future, for specific names, priority will have been irrevocably 

 acquired only when the species shall have been not only described, but 

 also figured. 



The President: 



J. Capellini. 



231 



