28 NATURAL HISTORY. [UPPER FLOOR. 
bound by a mutual interest. The Painted or Land Crabs 
( Gecarcinus ), live in holes in the earth, especially near 
burying-grounds, and only go to the sea during the breed¬ 
ing season ; their flesh is considered a delicacy, but it some¬ 
times proves deleterious. Besides the preceding, there 
are specimens of the Globular Crabs ( Lencosia ) ; Sea 
Spiders (Leptopodia ), with their very long legs ; Crested 
Grabs ( Calappa ), having the front part of the claws raised 
into a crest, and the hinder part of the shell projecting so 
as to cover the legs ; and lastly, those Crabs which have 
the two hinder pairs of legs placed on their back, ( Dorippe ), 
and the Death’s-head Crabs ( Dorima ). 
Cases 5, 6 , and 7 contain the Exochnata, or Long¬ 
tailed Crustacea, as the Lobsters and Shrimps; amongst 
which, those of the genus Hippa have the extremity of 
the tail simple. The Soldier Crabs live principally in 
the large cavities often observed in sponges, and in spiral 
shells, the texture of some of which,, by means not under¬ 
stood, they occasionally alter to such a degree, as to render 
it quite soft, and easily perforated by a common pin. 
Amongst these is a fine Cancer latro , said to live on the 
nuts of the palm trees. Also specimens of the Sea Locust 
(Scyllarus ), the Rock Lobsters ( Palinurus ), the Plated 
Lobster ( Galathea ), and the Crab Lobster ( Porcellana ), 
which, from the shortness of their tails, generally resemble 
crabs in appearance : the Scorpion Lobster ( Thalassina }, 
which lives great part of its life on land, and destroys the 
new made roads in India by the excavations it forms under 
them ; Lobsters ( Astacus ), one specimen exhibited w r as 
pale red, nearly of its present colour when alive; Shrimps 
( Palemori ), varying greatly in size. Then follow, (Case 8,) 
the Sea Mantes ( Squilla ), the glass-like Alima, and the 
Phyllosoma, with its shell scarcely thicker than a piece of 
paper. 
The rest of this Table is filled with the Crustacea which 
have sessile, immovable eyes, as, the fresh water Shrimps 
( Gammarus ), the Whale Lice ( Cyamns ), the Wood Lice 
(Otiiscus), Sea Bulls ( Cymothoa ), and the King Crab, 
w T hose style at the end of the body serves the animal as a 
means of defence, and is used by the natives of America 
to form points to their arrows. On the Wall, over the 
mantel piece, is a large King Crab from China, presented 
