ROOM V.] 
natural history. (Animals.) 
55 
oysters growing on their backs, showing that the crabs do not change 
their skin every year, or that the oyster grows to a large size in a very 
short space of time. 
Table 15. Oval-bodied crabs. 
Table 16. The fin-footed or swimming crabs, from different parts 
of the ocean. 
Table 17. The telescope or long-eyed crab; the land crabs. 
Table 18. The square-bodied crabs; the crested crab; and he 
Chinese fin-footed crab. 
Table 19. The porcelain crabs; the corystes; the back-footed 
crabs; and the death’s-head crabs, which usually form for themselves a 
case from pieces of sponge or shell. 
Table 20. The Bernhard or hermit crabs, which live in shells ; 
the tree lobster, which is said to climb cocoa trees to get at the nuts. 
Table 21. The sea locusts or scyllarus ; the sea craw-fish. 
Table 22. The scorpion lobster, which lives a great part of its life 
on land, and destroys new made roads in India by the excavations it 
forms under them. The lobster; one of the specimens exhibited was 
pale red, nearly of its present colour, when alive. The mantis crabs ; 
the different species of shrimps; the glass-like alima and phyllosoma, 
which are scarcely thicker than a piece of paper, and nearly as trans¬ 
parent as glass; they are found in the ocean near the equator ; the king 
crab, with its long stile-like tail and large head. 
Tables 23, 24. The sea acorn ; whale lice; barnacles, or goose 
shells, as they are called, from the extraordinary belief that they were 
the origin of barnacle geese. 
FIRTH ROOM. 
The Wall Cases contain the collections of Cartilaginous Fish, as 
the sharks, torpedos, rays, string-ray, &c. 
On the Top of the Wall Cases are some Rays and other Car¬ 
tilaginous Fish, too large to be placed in the Cases. 
Table Cases. Sponges of different kinds, showing their various 
forms and structure, and some preserved in flint, showing the same 
structure. 
JOHN EDWARD GRAY. 
Jan. 18, 1851. 
