206 JOURNAL OF GOXCHOLOGV, VOL. II, NO. 7, JULY, I905. 



receive a notation indicating both the name of the original author 

 and the name of the reviser. Example : Tcenia solium Linnd, partim, 

 Goze. 



The Law of Priority. 

 Art. 25. — The valid name of a genus or species can be only that 

 name under which it was first designated in the condition : 



a. That this name was published and acompanied by an indica- 

 tion, or a definition, or a description ; and 



b. That the author has applied the principles of binary nomen- 

 clature. 



Application of the Law of Priority. 



Art. 26. — The tenth edition of Linn(^'s Systema imturce^ 1758) is 

 the work which inaugurated the consistent general application of the 

 binary nomenclature in zoology. The date 1758, therefore, is 

 accepted as the starting p3int of zoological nomenclature and of the 

 Law of Priority. 



Art. 27. — The Law of Priority obtains and consequently the oldest 

 availalile name is retained : 



a. When any part of an animal is named before the animal itself] 

 h. When the larva is named before the adult ; 



c. When the two sexes of an animal have been considered as dis- 

 tinct species or even as belonging to distinct genera ; 



d. When an animal represents a regular succession of dissimilar 

 generations which have been considered as belonging to different 

 species or even to different genera. 



Art. 28. — A genus formed by the union 01 two or more genera 

 or subgenera takes the oldest valid generic or subgeneric name of 

 its components. If the names are of the same date, that selected by 

 the first reviser shall stand. 



The same rule obtains when two or more species or subspecies are 

 united to form a single species or subspecies. 



Recommendation. — In absence of any previous revision, the establishment 

 of precedence by the following method is recommended. 



a. A generic name accompanied by specification of a type has precedence 

 over a name without such specification. If all or none of the genera have types 

 specified, that generic name takes precedence the diagnosis of which is most 

 pertinent. 



b. A specific name accompanied by both description and figure stands in prefer- 

 ence to one accompanied only by a diagnosis or only by a figure. 



c. Other things being equal, that name is to be preferred which stands first in 

 the publication (page precedence). 



Art 29. — -If a genus is divided into two or more restricted genera, 

 it^ vali^ name mu:>t be retained for one of the restricted genera. If 



