FLOOR.] 
FOSSILS. 
29 
and the Herrings (Clupeidce), 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 
he 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 
large 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, ami 
the teeth of different 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 land reptile called Sceli- 
dosaurfts, 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. On the right of the centre Case No. 
10, in the two first compartments, will be found the remains of the 
HyliBosaurus, including the large block from Tilgate Forest, dis- 
covered by Dr. Mantell, which contains a considerable series of verte- 
brae, 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 Plesiosaurus (P. laticeps, 
Owen), which has recently been added to the collection. 
The remainder of this Case is occupied by the fossil Crocodiles. 
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 vertebra?, the body, or central part, 
being concave in front and convex behind, attention may be directed 
to the skull of the Crocodilus ToUapicus, mentioned by Cuvier as the 
" Crocodile de Sheppey," and a smaller Crocodile skull, which, like the 
last, is from the Loudon Clay of Sheppey, and received the name of 
Crocodilus Spenceri from Dr. Buckland. The most gigantic Crocodilian 
remains hitherto found are those from the Siwalik Hills, they include 
both examples of the true Crocodiles and of the long and slender- 
snouted Gavials. 
The Reptilian series is here interrupted by a collection of Bird re- 
mains, which occupy the Wall Case No. 1 1 at the end of the room. 
