NORTH AMERICAN" TALJEONTOLOGY FOR 1886. 



By John Belknap Marcou. 



Translation of a portion of tbc resolutions concerning nomenclature 

 ami colors voted by the International Geologic Congress at the meet- 

 ings of the 27th, 28th, 29th, 30th of September and 1st of October, 1881. 

 (Extracteil from the '' Compte rendu de la 2me Session, Bologne, 1881, 

 Congres Geologiqne International, p. 108.'') 



RULES TO BE FOLLOWED IN ORDER TO ESTABLISH THE NOMENCLAT- 

 URE OF SPECIES, 



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

 nated by a generic and a specific name. 



2. Each of these names is comi)osed 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 j?pace, 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 coirespondiug abbrevi- 

 ations. 



4. The specific name should always be defined by indicating the 

 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 when 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 Linnreus, twelfth 

 edition, 1760. 



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 



