In transferring these terms into English, when the term is new in French as well as English, we have little difficulty; for we may take nearly the same liberties in English which are taken in French; and hence we may say _mammifers_ (rather _mammals_), _cetaceans_ or _cetaces_, _batracians_ (rather _batrachians_), using the words as substantives. But in other cases we must go back to the Latin: thus we say _radiate_ {325} animals, or _radiata_ (rather _radials_), for _rayonnés_. These changes, however, rather refer to another Aphorism. (Mr. Kirby has proposed _radiary_, _radiaries_, for _radiata_.) 5. When new Mineral Species have been established in recent times, they have generally had arbitrary names assigned to them, derived from some person or places. In some instances, however, descriptive names have been selected; and then these have been generally taken from the Greek, as _Augite_, _Stilbite_, _Diaspore_, _Dichroite_, _Dioptase_. Several of these Greek names imposed by Haüy, refer to some circumstances, often fancifully selected, in his view of the crystallization of the substance, as _Epidote_, _Peridote_, _Pleonast_. Similar terms of Greek origin have been introduced by others, as _Orthite_, _Anorthite_, _Periklin_. Greek names founded on casual circumstances are less to be commended. Berzelius has termed a mineral _Eschynite_ from αἰσχυνὴ, _shame_, because it is, he conceives, a shame for chemists not to have separated its elements more distinctly than they did at first. 6. In Botany, the old names of genera of Greek origin are very numerous, and many of them are descriptive, as _Glycyrhiza_ (γλυκὺς and ῥιζα, sweet root) liquorice, _Rhododendron_ (rose-tree), _Hæmatoxylon_ (bloody wood), _Chrysocoma_ (golden hair), _Alopecurus_ (fox-tail), and many more. In like manner there are names which derive a descriptive significance from the Latin, either adjectives, as _Impatiens_, _Gloriosa_, _Sagittaria_, or substantives irregularly formed, as _Tussilago_ (à tussis domatione), _Urtica_ (ab urendo tactu), _Salsola_ (à salsedine). But these, though good names when they are established by tradition, are hardly to be imitated in naming new plants. In most instances, when this is to be done, arbitrary or local names have been selected, as _Strelitzia_.