FLOOR.] 
FOSSILS. 
33 
group. The Cycloids occupy the compartments 27 to 36. Their 
scales have the edges smooth. The Fishes of the Mackerel tribe 
{ScomheridcB), of the Carp tribe (Cyprinidce), of the Pikes {Esocida)^ 
and the Herrings {Clupeidcs), may be noticed as forming the more 
important families of this division. 
ROOM III. 
Excepting the two Cases 7 and 11, the whole of the Wall Cases in 
«this room are devoted to Reptilian remains ; and amongst them may 
be first noticed the Dinosauria, which group contains the largest ter- 
restrial species, such as the Iguanodon and Megalosaurus. In the 
Middle Case (No. 9), on the north side of the room, are arranged the 
remains of the gigantic Iguanodon : firstly, and in the centre, the 
Sarge slab of Kentish rag from Mr. Bensted's quarry near Maidstone, 
containing a great portion of the skeleton of a young individual ; to 
the right of this will be found portions of the skull and lower jaw, and 
the teeth of difi'erent specimens of the same species ; and to the left, 
■extending to Case 8, are nearly all the more characteristic parts of the 
skeletons of various Iguanodons, chiefly from the Wealden formation 
■at Tilgate, and in the Isle of Wight. These specimens are mostly 
from the collection of the late Dr. Mantell. On the lower shelves 
to the right of the centre case containing the Iguanodon will also be 
found the almost entire remains of another laud reptile called Sceli- 
dosaurus, from the Lias of Charmouth, Dorset. The remainder of the 
•Case to the left (No. 8) is occupied by the remains of other gigantic 
reptiles from the Wealden and upper Oolitic formations, including the 
Megalosaurus and Cetiosaurus. A humerus, nearly five feet in length, 
of the last-named reptile [Cetiosaurus) from the Kimmeridge Clay of 
Weymouth, Dorset, has just been added to this Case. On the right 
of the centre Case No. 10, in the two first compartments, will be 
found the remains of the Hylaosaurus, including the large block from 
Tilgate Forest, discovered by Dr. Mantell, which contains a considera- 
■ble series of vertebrsR, dermal spines, and other parts of this singular 
reptile. The dermal spines and other remains of the Polacanthus, a 
new Wealden reptile from the Isle of Wight, are arranged in Case 9 ; 
:and on the top of the same Case is a new species of JPlesiosaurus 
{F. laticeps, Owen), >\hich has recently been added to the collection. 
The remainder of this Case is occupied by the fossil CrocodVles. 
Among the specimens may be noticed the slender-snouted Crocodi- 
lians, in which the vertebrae are bi-concave, including the Teleosaurus 
'Chapmanni, from the Lias of Whitby, and other Teleosauri from 
the Lias and Oolites of Germany and France. Among the Croco- 
dilians with the ordinary form of vertebrje, the body, or central part, 
being concave in front and convex behind, attention may be directed 
to the skull of the Crocodilus Toliapicus, mentioned by Cuvier as the 
Crocodile de Sheppey," and a smaller Crocodile skull, which, like the 
last, is from the London Clay of Sheppey, and received the name of 
Crocodilus Spcjiceri from Dr. Biickland. The most gigantic Crocodilian 
remains hitherto found are those from the Siwalik Hills, they include 
D 
