OcTOBER 27, 1899. ] 
ef the early scientists named them for the 
animals of the time and locality. Lartet 
named them respectively, Cave Bear, Mam- 
moth, Reindeer, and Ox; Dupont, Mam- 
moth and Reindeer. The English gener- 
ally employed the terms ‘river-drift’ (for 
the earlier, paleolith) and ‘cavern.’ De 
Mortillet made an exhaustive study anda 
consequent elaborate classification named 
for, and based on the industries found in 
certain localities : The Chelléen after Chelles 
(Seine-et-Marne), Acheulléen after St- 
Acheul (Somme), Mousterien after the 
cavern of Le Moustier (Dordogne), Solu- 
treen after the station of Solutré (Sdéone-et- 
Loire), Madalenien after the rock-shelter 
of La Madeleine (Dordogne), and Tour- 
assien after La Tourasse (Haute-Garonne), 
the last representing the hiatus between the 
Paleolithic and Neolithicages. This classi- 
fication was carried throughout the pre- 
historic ages. 
SCIENCE. 
593 
experience will satisfy one of its excellence. 
Its principle is to give an epoch of culture 
the name of a locality where that particular 
culture is manifested in its greatest purity. 
This may be an arbitrary system, but it 
has the great desideratum of all systems of 
nomenclature—certainty and definiteness. 
By such, one knows exactly what is meant, 
and this is the chief purpose of nomen- 
clature. The American geologic classifica- 
tion is based largely on the same system. 
High-Plateau Paleoliths, Ightham, Kent. 
Among many discoveries of paleolithic 
implements in Europe was a certain class 
which indicated a human occupation earlier 
than those found in the river gravels. These 
belong to the high plateaux between the 
headwaters of the streams. The principal 
discovery of implements of this class was by 
Mr. Benjamin Harrison, of Ightham, Kent ; 
but knowledge of the significance thereof is 
- Mons. de Mortillet’s classification of prehistoric chronology, as applied to France. 
TIME. AGES. PERIODS. 
EPOCHS. 
Merovingian. 
Wabenien ( Waben, Pas-de-Calais). 
Roman. 
Historic. 
Champdolien (Champdolent, Seine-et-Oise). 
Lugdunien (Lyon, Rhone). 
Tron. 
Galatian. 
Beuvraysien (Mont Beuvray, Nievre). 
Marnien (Department of Marne). 
Halstattien (Hallstatt, Austria). 
Bronze. 
Quaternary—Actual. 
Protohistoric. 
Tsiganien. 
Larnaudien (Larnaud, Jura). 
Morgien (Morges, canton of Vaud, Switzerland). 
Neolithic. 
Robenhausien (Robenhausen, Zurich, Switzerland). 
Campignyen (Campigny, Seine-Inferieure). 
Tardenoisien (Fére-en-Tardenois, Aisne). 
Stone. Paleolithic. 
Prehistoric. 
Quaternary—Auncient. 
Tourassien (La Tourasse, Haute-Garonne) Ancient hiatus. 
Madelainien (La Madeleine, Dordogne). 
Solutréen (Solutre, Saine-et-Loire). 
Moustérien (Le Moustier, Dordogne). 
Archuléen (Saint-Achuel, Somme). 
Chelléen (Chelles, Seine-et-Marne). 
Eolithic. 
bry. 
Ter- 
Puycournien (Puy-Courny, Cantal). 
Thenaysien (Thenay, Loire-et-Cher). 
Objection may be made to the 
nomen- 
elature of this classification, but a slight 
due to the great geologist, Professor Joseph 
Prestwich. 
