224 REPORT—1843. 
and Elephant, had been the prey of the Hyznas, which inhabited England 
immediately preceding the formation of the drift. 
The entire skull of a Hippopotamus, which was discovered in the drift- 
gravel below a peat-bog in Lancashire, is figured by Lee in his Natural 
History of that county. 
Amongst the fossils of the Hippopotamus which I have personally examined 
from British strata, one of the finest isa considerable portion of the lower 
jaw, now in the museum of Miss Gurney, from the freshwater deposits over- 
lying the fluvio-marine crag near Cromer. It contains six molars on one 
side, which occupy an alveolar extent of 1 foot The first molar is se- 
parated by an interval of 9 lines from the second. In. Lin. 
The depth of the jaw at the third molar tooth is .......- 4 9 
From the back part of the last socket to the under margin 9 0 
of the descending angular process. ....-+.+-+++-- 
In the same rich collection there are several detached molar teeth of Hip- 
popotamus from the same formation, a tusk 12 inches in length, and an 
incisor of the upper jaw; all establishing the identity of the present species 
with the Hippopotamus major of Cuvier, the remains of which occur in the 
drift of various parts of continental Europe. 
In the Yorkshire Museum there is a molar tooth of the Hippopotamus ma- 
jor, from Overton near York. 
In the Norwich Museum there is a tusk of the Hippopotamus major, which 
was dredged up from the oyster-bank at Happisburgh : it is black and heavy, 
being penetrated by iron. 
Mr. Brown of Stanway possesses a portion of the tusk of the Hippopotamus 
from the till at Walton in Essex ; it is referable to the Hippopotamus major : 
remains of the same extinct species have been found at Grays and Harwich. 
Remains of the Hippopotamus have been found in several of the limestone 
caves in England besides that at Kirkdale; as, for example, at Kent’s Hole, 
Torquay. Several teeth of the Hippopotamus were found, associated with 
Mammoth, Rhinoceros, Aurochs, Ox, Hyzna, and Bear, in the cavern at 
Durdham Down, recently described by Mr. Stutchbury. 
Genus Lophiodon. 
Prior to the year 1839, no fossils referable to any member of the Mammalian 
class had been detected in the eocene formation called the London and plastic 
clay. A fossil canine tooth brought up from a depth of 160 feet, out of the 
plastic clay, while sinking a well in the neighbourhood of Maidstone, un- 
equivocally establishes the fact that the genus Lophiodon has contributed to the 
organic remains of that formation. For the opportunity of examining this 
rare and interesting fossil I am indebted to Mr. Alport, who has recorded the 
circumstances attending its discovery, with my note of identification, in his 
interesting work, ‘ The Antiquities and Natural History of the Town of 
Maidstone in Kent.’ The size of the canine tooth agrees with that in the 
Lophiodon which Cuvier has called “La grande espéce d’Argenton,” ren- 
dered by Fischer* Lophiodon Isselense, properly Isselensis. The matrix yield- 
ing the original fossils of this species is a freshwater hard marl, full of the 
shells of Planorbis and Lymnea, with remains of Crocodiles and Trionyces. 
The corresponding formation at Binstead in the Isle of Wight belongs to 
the eocene tertiary period, and has likewise furnished a fossil referable to the 
genus Lophiodon, and by its size to the Loph. Isselensis. It is a median 
phalanx of the right fore-foot, and was submitted to me as the bone of an 
Iguanodon. There is, in fact, a considerable general resemblance between 
the middle phalanges of this great herbivorous reptile and those of the larger 
hoofed Mammals; but with respect to the fossil in question, the configura- 
* Systema Mammalium, p. 413, 

