8 
POPULAR SCIENCE REVIEW. 
Nevertheless, I cannot recommend the geologist to delay over 
its geology unless his time is of no importance. Mr. Scrope 
thought that the 66 Domite,” or trachytic mass of which it con- 
sists, is of the same age as the volcanic products of the Puy 
de Pariou and Puy de Dome. M. Lecoq assured us that he 
had arrived at other results, and was of opinion that the Domite 
belonged to the age of the trachytic lavas of Mont Dore, and 
that the newer Puvs and their outbursts were erupted through 
and among the 66 Domite.” If I may venture to pronounce an 
opinion, I should prefer the explanation of M. Lecoq. When 
we find a great extension of old basalts, apparently of the same 
age as the Mont Dore basalts, extending right away from Mon- 
tredon on the south, by the Plateau of La Serre ; again between 
Channat and Ternant ; and as far northwards as Lague, south of 
the Puy de Jume, it is impossible to avoid the conviction that 
there was a great line of volcanic outbursts along the line of 
the Puys de Dome of much earlier date than those late 
eruptions. But whether this supposition is right or not, none 
of the Puys just mentioned furnish such satisfactory dis- 
plays of lava torrents and other phenomena as do the Puy de 
Pariou and many others. The Puy de Pariou is remarkable 
for its perfect crater, and is within a short walk of the Puy de 
Dome. It is well to trace the lava current downwards to 
La Baraque, and observe the island of granite which it surrounds 
at Orcines and the check it meets with at the junction below 
Bonabry from the old basalt of Prudelle. When visiting 
Pariou in May (1876) we found the rim of the crater studded 
with the beautiful Anemone montana , with its maroon- 
coloured petals and bright yellow stamens. Below, near the 
outburst of the lava current, we gathered Anemone ranuncu- 
loides , Corydcilis solida , Scillcc bifolia , Orchis sambucina , Pul- 
monaria officinalis , Daphne mezereum , and a large variety of 
Primula elatior . Sir David Wedderburn made the depth of 
the crater by aneroid somewhat less than does Scrope, viz., 
300 ft. A small Viola grew in abundance in the crater. From 
our notes, on a former visit in the month of July, I find that 
Cephalanthera rubra was found in the crevices of the Pariou 
lava current ; this plant is extremely rare in England, 
having only been gathered on one locality of the Cotswold 
Hills in Gloucestershire, and in one copse in Somersetshire. 
Here, too, grows a peculiar rose with glaucous foliage and red 
stipules much dilated ( Rosa rubrifolia ? ), and the guide as- 
serted that it would not bear transportation. We gathered also 
Lychnis viscosa , a plant which grows too on Stanner Rocks, 
an ancient volcanic rock which traverses Silurian limestones 
near Kington in Herefordshire. 
Another expedition among the more recent volcanic phe- 
