22 LAWS OF NOMENCLATURE. 



since Liimseus, provided it be consistent with, tlie 

 essential rules of nomenclature. 



Art. 16. No one ought to change a name or a com- 

 bination of names without serious motives, derived 

 from a more profound knowledge of facts, or from the 

 necessity of relinquishing a nomenclature that is iu op- 

 position to essential rales (art. 3, first paragraph, 4, 

 11, 16, etc. : see sect. 6). 



Art. 17. The form, the number, and the arrange- 

 ment of names depend upon the nature of each group, 

 according to the following rules. 



Section 2. 



Nomenclature of the different hinds of Groups. 

 § 1. Names of Divisions and Subdivisions, of Classes and Subclasses. 



Art. 18. The names of divisions and subdivisions, 

 of classes and subclasses, are drawn from their principal 

 characters. They are expressed by words of Greek 

 or Latin origin, some similarity of form and termina- 

 tion being given to those that designate groups of the 

 same nature (Phanerogams, Cryptogams; Monocoty- 

 ledons, Dicotyledons, etc.). 



Art. 19. Among Cryptogams, the old family names, 

 such as Filices, Musci, Fungi^ Lichenes^ Algcs, may be 

 used for names of classes and subclasses. 



appears to answer much, better to the sense of mStis ; breed precisely 

 implying a race, and half-breed the mixture of two races. It may, 

 however, likewise be suggested that the shortness of the French word 

 metis, analogous to the Spanish mestizo, and evidently derived from 

 the Latin mistus, or mixtus, wiU. perhaps induce English botanists to 

 adopt it, together with the word half-breed. The latter is undoubtedly 

 more expressive, but metis has over it the advantage of being intelli- 

 gible in several tongues. The term mule, as applied to the mixture of va- 

 rieties or races, is in constant use amongst English florists ; but is too ob- 

 viously erroneous to be sanctioned by scientific writers. (Translator.) 



