34 LAWS OF NOMENCLATURE. 



Aet. 60. Every one is bound to reject a name in 

 the following cases : — 



(1.) "When the name is applied, in the Vegetable 

 Kingdom, to a group that has before received a name 

 in due form. 



(2.) When it is already in use for a class or for a 

 genus, or is applied to a division or to a species of the 

 same genus, or to a subdivision of the same species. 



(3.) "When it expresses a character or an attribute 

 that is positively wanting in the whole of the group 

 in question, or at least in the greater part of the ele- 

 ments it is composed of. 



(4.) "When it is formed by the combination of two 

 languages. 



(5.) "When it is in opposition to the rules laid down 

 in Section 5. 



Aet. 61. The name of a cohort, subcohort, Order, 

 suborder, tribe, or subtribe, must be changed if taken 

 from a genus found not to belong to the group in 

 question. 



Aet. 62. When a subgenus, a section, or a subsec- 

 tion passes as such into another genus, the name must 

 be changed if there is already, in that genus, a group 

 of the same rank, under the same name. 



When a species is moved from one genus into 

 another, its specific name must be changed if it is al- 

 ready borne by one of the species of that genus. So 

 likewise when a subspecies, a variety, or some other 

 subdivision of a species is placed under another spe- 

 cies, its name must be changed if borne already by a 

 form of like rank of that species. 



Aet, 63, When a group is transferred to another, 

 keeping there the same rank, its name will have to be 

 changed if it leads to misconception. 



