36 
NORTH GALLERY. 
[UFPER 
this group, from the Cretaceous Deposits, are arranged in Table-case 
No. 16, Room IV. 
In the corner Case are portions of the skuli, lower jaw, &c, of a 
gigantic Reptile, allied to the Lizards ; it is from the Upper Chalk for- 
mation at Maestricht ; also specimens from the Chalk of England 
and the Eocene Tertiary of Alabama, United States. The most in- 
structive illustration of this Reptile is the cast of a nearly entire skull, 
presented by Raron Cuvier, who published a detailed account of the 
animal in his great work on Fossil Remains, adopting for it the name 
Mosasaurus (Crocodile of the Meuse), proposed by Conybeare. 
In Case 2 will be found the remains of a gigantic land-lizard (Mega- 
lania) from recent deposits in Australia, now believed to be extinct. 
The majority of the fossils here exemplify the large and very remarkable 
Reptile, called Bicynodon. discovered in South Africa by Mr. A. G. Bain. 
The animal is especially remarkable, inasmuch as, although it belongs 
to the Lizard tribe, it possessed but two teeth, and these in the form 
of large tusks, descending nearly vertically from the upper jaw. Here 
are also placed various Batrachian remains from the Coal-measures, 
the Trias, and Tertiary formations, among which may be specially 
mentioned the head of Belodon Kapffii from Stuttgardt, and the 
gigantic Salamander from GEningen (better known as the "Homo 
Diluvii testis," of Scheuchzer). 
At the end of the Case are placed various bones of the skeleton and 
parts of the shell of the enormous Tortoise from India, of which a 
restored model will be found in the Lobby to Room No. I. 
In Case 3 are the remainder of the Fossil Tortoises and Turtles. 
The most conspicuous amongst these, is the Chelone Hoffmanni, 
Gray ; a Turtle from the Upper Chalk of Maestricht, in the Nether- 
lands, which attained very large dimensions, the carapace being, in 
some individuals, as much as five feet in length. In Cases 4, 5, 
and 6, commences the series of the large Sea-reptiles (Enaliosauria). 
They present two well-marked modifications of structure — the Plesio- 
sauri, in which the neck is long and the head small, and which are 
arranged in this room ; and the Ichthyosauri, in which the head is 
large, and joined to the body by a very short neck. 
On the Wall Cases 4-6, 8, and 9, are arranged fine examples of this 
group, including Plesiosaurus dolichodeirus, and rostratus, and a fine 
head of Pliosaurus grandis (the teeth of this latter are placed in Wall 
Case 5). 
The Wall Case No. 7, at the end of the room, contains Mammalian 
remains of the Ruminant tribe from the Siwalik Hills and other parts 
of India; and various Reptilian remains, from the Trias of South 
Africa, are arranged in the corner of this case : they form part of 
the series displayed in Wall Case 2, in the same room. 
ROOM IV. 
Here the series of Reptilian remains is continued, by the Sea-rep- 
tiles already alluded to in the account of the preceding room, the 
