76 NATURAL HISTORY. (Fossils.) [NORTH 
likewise from the Mantellian collection, are the almost unique specimens 
of Acrognathus Boops and Aulolepis typus, figured, and provision¬ 
ally placed with the Halecoids, in the same work. To these are added 
specimens of the singularly-preservedangmarset, (Salmo Groenlandicus 
of Bloch, Mallotus villosus of Cuvier,) which occur in the shape of 
elongated nodules or hard argillaceous mummies, at the Sukkertop, on 
the West Coast of Greenland. 
The few remains referable to the Eel family (Muraenoids) will be 
found in the lower shelves of Case 36. 
The specimens in Cases 37 to 40 belong to the Order of Placoid 
fishes, consisting of spines of Aster acanthus, Or acanthus, which were 
too large to be arranged with the remains of allied genera in the small 
Table* Cases, and which have already been noticed. 
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 
lage 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 different specimens of the same species; and to the left, 
extending into Case 8, are nearly all the more characteristic parts 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. 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 Mega¬ 
losaurus and Cetiosaurus. On the right of the centre (Case No. 10) 
are the Crocodilian remains; among the specimens may be noticed the 
slender-snouted Crocodilians, in which the vertebrae are biconcave, in¬ 
cluding the Teleosaurus Chapmanni from the lias of Whitby, and the 
other Teleosauri from the lias of Germany. The beautiful specimen 
contained in a slab of white lias from Monheim, in Franconia, is well 
worthy of particular notice ; it was originally figured and described by 
Soemmering in the Memoirs of the Academy of Munich, under the 
name of Crocodilus priscus, this is on the upper shelves of the Case; 
on the lower shelves will be found the remains of the Hylaeosaurus, in¬ 
cluding the large block from Tilgate Forest, discovered by Dr. 
Mantell, which contains a considerable series of vertebrae, dermal 
spines and other parts of this singular reptile. Among the Crocodilians 
with the ordinary form of vertebrae, 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, has received the name 
Crocodilus Spenceri from Professor Owen. The most gigantic Cro¬ 
codilian remains hitherto found are those from the Sewalik Hills, 
