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length. The extremities of the straight incisors are very 
peculiar in form in the fossil species, to which I do not find 
any allusion by Professor Owen, in his valuable History of 
British Fossil Mammalia. 
Besides the Hippopotamic remains, I have discovered, 
amongst the numerous bones obtained from the brick- 
field at Wortley, the following belonging to the Elephant : 
The glenoid cavity of the scapula, portions of the femur and 
tibia ; the articular surfaces of the humerus and left femur ; 
left os-calcis ; part of the ischium, with the acetabulum, and 
fragments of the tusks ; also a large portion of the jaw with 
teeth; a molar tooth, and fragments of the radius, &c, 
belonging to some large ruminant, which I believe to be 
the Urus, Bos primigenius. It is somewhat singular, how- 
ever, that there is a marked difference in the state of per- 
fection and the number of the bones of these different 
animals. For, while those of the Hippopotamus are the most 
perfect as well as most numerous, and lie in such immediate 
proximity as to warrant the supposition that the animals 
had lived on the spot or in its immediate vicinity, those 
of the Elephant are few, from different parts of the body, 
much fractured, and apparently weatherworn; and those again 
of the Urus still fewer in number, more broken, and in some 
parts rounded as if by attrition ; from which fact I should 
infer that these latter have been washed down from the 
more elevated districts. 
The remains of the Hippopotamus, w T hich are by no means 
so common as those of the Rhinoceros, have been found in 
various parts of Britain, as Gloucestershire, Somersetshire, 
Worcestershire, Lancashire, Yorkshire, Huntingdon, Essex, 
Devonshire, Norfolk, and Middlesex, and in every instance 
in fluviatile deposits ; and there is no evidence, according to 
Professor Owen, that it existed on our planet prior to the 
deposition of the Pliocine division of the Tertiary epoch. 
That is the last great deposit before the superficial accu- 
z 
