Norwich Castle Museum, 139 
Tortoise, and others. Of the Turtles, Chelone imbri- 
cata, the Hawk’s-billed Turtle, an East Indian species, 
may be mentioned; and a monster Green ‘Turtle 
(Chelone viridis) from the West Indies, which, when 
living, weighed 4974 lbs. This is, however, by no 
means the limit of their growth, for they are said to 
reach a length of seven feet, and to weigh 800 to goo 
lbs. 
The next four cases are devoted to a small collec- 
tion of BRITISH MAMMALS. They are not at 
present arranged systematically, and we will notice 
them in the order in which they occur. 
Cases V. and VI. 
contain representatives of the RODENTS, amongst 
which are the Hare (Lefus timidus) and RaBBiTs 
(LZ. cuniculus), both wild and tame, with several varieties. 
The GUINEA-PIG is also awarded a position in this 
case, for although not even indigenous to Europe, it 
has been so long domesticated, that its origin 1s 
uncertain. The probability, however, seems to be in 
favour of its Peruvian descent from a species known 
as Cutlers Cavy (Cavia cutleri). The too well- 
known Brown Rar is even more fully acclimatised 
than the Guinea-pig, but 1s equally of foreign origin. 
Here it is believed to have exterminated the Rat which it 
found in possession, the so-called OLD ENGLISH BLACK 
Rat (JZus ra/tus), itself an Eastern adventurer, but of 
a much earlier date. Mus rattus lingers in a few 
isolated localities in Great Britain, and the stock is 
probably sometimes replenished by importations from 
the Continent. The domestic Mousn (MZ. musculus) 
needs no mention, and with it are the pretty long- 
tailed FieELD Mouser and the elegant little HARvEsT 
Mouse (JZ. minutus). The Voles are represented by 
