570 
and pistacite ; but the earthy strata are stated to occur at higherlevels: 
On the opposite side of the river is a section several thousand feet in 
vertical dimensions intersected by a net-work of granite veins and 
crossed by black staitis derived from the carbonaceous layers. On 
opening on the hollow in which the village of Change is situated 
earthy strata again appear. This poift was the boundary of Mr. 
Everest’s journey, aid he was prevented from éxamining the locality 
which produces the Ammoiiites and other fossils obtained by Dr. 
Gerard ; but he believes, from the information stipplied by the natives, 
that they are niet with abundantly beyond the froiitier, imbedded 
in black compact limestone and earthy carbonacéous shale. Mr. 
Everest fuither states, that since his joufney Captain Hutton has 
discovered therm within the froiitier. 
In the course of the memoir the author mentions having seen at 
Séénum the skin of a “ leopard” recently killed neat the village, 
though large quatitities of snow were then (May) lying upon the 
ground, and that he has frequently observed in February and March 
their tracks on the snow as high as the limit of the forests. He also 
States that he has observed monkeys at the height of full 8000 feet 
above the sea in thé same months whet the ground was covered deep 
with snow, feeding in great ntimbers on the seeds of the fir cones. 
A paper was afterwards read containitig a“ Description of the Re- 
wiains of Six Species of Marine Turtles (Chelones) from the London 
Clay of Shéppey and Hatwich.” By Richard Owen, Esq., F.R.8:, 
F.G.S.; Hunterian Professor in the Royal College of Surgeons. 
The author commences by quoting the generalizations given ih 
the latest works which treat of Fossil Chelonians; and examines the 
évidente oi which those froin the Eocene clay of Sheppey had been 
referred exclusively to the freshwater genus Hmys by Cuvier and 
others, and he pints owt the circumstances which invalidate the 
coiiclusions that had been deduced from it. He then proceeds to 
deseribe the fossils and to show the characters by which he has 
éstablished the existence of five species of marine turtles from the 
London Clay at Sheppey; and a sixth species from the same fotma- 
tion near Harwich. 
1; Chelone breviceps.—The first species, fourid at Sheppey, is called 
by the author Chelone breviceps, and its unequivoeal marine nature 
was recognised by a nearly perfect cranium, wanting only the occipital 
spife, and presenting a strong and uninterrupted roof; extended 
from the parietal spine on each side over the temporal openings; the 
roof being fornied chiefly by a great development of the posterior 
froiittals. Further evidence of its marine origin exists in the large 
sizé and lateral aspect of the orbits, their posterior boundary extend. 
ing béyond the anterior margin of the parietals ; also in the absence 
