AMONG THE VOLCANOS AND GLACIERS OF AUVERGNE. 
5 
erratics liad been 'transported by the action of melting snow, 
but he had then failed to find any signs of glacier action among 
the Auvergne mountains. M. Lecoq further directed our at- 
tention to the remains of the Marmot and Mammoth, teeth 
and bones of which animals he had obtained from crevices and 
cracks in the most modern lavas, such as those of Beaumont, 
Royat, and Volvic. We visited this museum again this sum- 
mer, and saw completed that grand map of Auvergne which 
was coloured by This great naturalist with his own hands. Alas, 
that hand lies now cold in the tomb, and we missed sadly the 
courteous welcome and kindly explanations of many a relic rich 
and rare. His fine museum M. Lecoq left to his fellow-towns- 
men, a monument to his memory of an undying nature. The 
town museum contains a valuable collection of Roman amphorae, 
utensils, and coins, some of which were found during the ex- 
cavations made at Grergovia by the orders of Napoleon III. 
when writing his “ Life of Caesar.” There is, too, a fair collec- 
tion of stone implements, and the worst collection of daubs of 
oil paintings under the sun. 
There is no greater mistake than to suppose that a walk to 
the Puy de Dome, Pariou, and Grraveneire will enable the geolo- 
gist to comprehend the geology of Auvergne ! Everyone should 
be possessed of the admirable work by Mr. Poulett Scrope on 
the 66 Extinct Volcanos of Central France yet even with this 
book at hand for reference it is not easy for those whose time is 
limited to select localities which will enable the tourist to grasp 
the striking geological phenomena presented by volcanic out- 
bursts of long separated ages ; of lacustrine formations of lakes 
now denuded 1,000 ft. in depth ; of old river gravels far above 
the present river levels ; and lava currents which once occupied 
valleys and gorges now standing out as mountain outliers, and 
cut clean away from the mass to which they originally belonged. 
I think that anyone who has, say, a fortnight at his disposal, 
would do well to devote his first attention to the granitic 
plateaux, through which the volcanos of the Puys de Dome 
have been erupted, and those valleys and glens which had been 
eroded in the granitic rocks forming the old country before the 
outburst of the volcanos, and down some of whose valleys the 
more modern lavas have flowed for miles. 
Granite Plateau . — A reference to the geological map of 
Central France shows a large tract of elevated country princi- 
pally composed of granitic rocks set in a framework of strata of 
Jurassic age. It is evident also that granitic rocks constituted 
the old land surface through which burst the great miocene 
volcanos of Mont Dore and the Cantal, and that granite moun- 
tains formed the shores of the ancient eocene and miocene 
lakes. For the investigation of portions of the granitic plateau 
