IT will be recollected that Terminology is a language employed for describing objects, Nomenclature, a body {312} of names of the objects themselves. The _names_, as was stated in the last maxim, may be arbitrary; but the _descriptive_ terms must be borrowed from words of suitable meaning in the modern or the classical languages. Thus the whole terminology which Linnæus introduced into botany, is founded upon the received use of Latin words, although he defined their meaning so as to make it precise when it was not so, according to Aphorism V. But many of the terms were invented by him and other botanists, as _Perianth_, _Nectary_, _Pericarp_; so many, indeed, as to form, along with the others, a considerable language. Many of the terms which are now become familiar were originally invented by writers on botany. Thus the word _Petal_, for one division of the corolla, was introduced by Fabius Columna. The term _Sepal_ was devised by Necker to express each of the divisions of the calyx. And up to the most recent times, new denominations of parts and conditions of parts have been devised by botanists, when they found them necessary, in order to mark important differences or resemblances. Thus the general _Receptacle_ of the flower, as it is termed by Linnæus, or _Torus_ by Salisbury, is continued into organs which carry the stamina and pistil, or the pistil alone, or the whole flower; this organ has hence been termed[49\4] _Gonophore_, _Carpophore_, and _Anthophore_, in these cases. [Note 49\4: De Candolle's _Th. El._ 405.] In like manner when Cuvier had ascertained that the lower jaws of Saurians consisted always of six pieces having definite relations of form and position, he gave names to them, and termed them respectively the _Dental_, the _Angular_, the _Coronoid_, the _Articular_, the _Complementary_, and the _Opercular_ Bones. In all these cases, the descriptive terms thus introduced have been significant in their derivation. An attempt to circulate a perfectly arbitrary word as a means of description would probably be unsuccessful. We have, indeed, some examples approaching to arbitrary designations, in the Wernerian names of colours, {313} which are a part of the terminology of Natural History. Many of these names are borrowed from natural resemblances, as _Auricula purple_, _Apple green_, _Straw yellow_; but the names of others are taken from casual occurrences, mostly, however, such as were already recognized in common language, as _Prussian blue_, _Dutch orange_, _King's yellow_.