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SUPPLEMENT 
In this part of Africa, it does not appear, from all re- 
searches, that any species of gecarcinus or tourlourous, pro- 
perly so called, has as yet been found. But the habitation of 
the ocypode hippeus of Olivier extends from Syria and Egypt 
as far as Cape de Verde, from which M. Latreille suspects that 
to this species must be applied what Pere Labat has related 
concerning the crabs of the point of Barbary. 
According to Artus, earth-crabs are also to be seen on the 
Gold-coast similar to those of the Leeward Islands, and which 
supply the inhabitants with an excellent food. They dig 
themselves holes, which serve as a retreat. There are found 
in the island of Java other earth or land-crabs, but which are 
not eaten. They quit their burrows during the day, and feed, 
according to report, on plants. These, perhaps, may be the 
ocypode ceratophthalma, which is very much extended on the 
maritime coasts of the East Indies. The collection of Crus- 
tacea of New Holland, formed by Peron and M. Lesueur, 
although very numerous, presents no species of ocypode and 
gecarcin. 
Linnseus informs us that the ocypode hippeus, which he 
calls cursor, and under which name he includes this species 
and ceratoplithalma, is Jo be found in the Mediterranean sea, 
as well as in the Indian Ocean ; and that after the setting of 
the sun it quits the water for the sandy shores, and’ runs 
with an extreme velocity. 
Belon asserts that the lizards succeed in. catching it for the 
purpose of food. Olivier has had no opportunity of verifying 
this assertion. 
The ancient naturalists, and some among the moderns, have 
represented the Crustacea named Pinnotheres, and also 
pinnoter and pinnophylax, as the sentinels and guardians of 
the mollusca of the genus pinna, as their commensals, and in 
some sort their sutlers. It was believed that they were born 
at the same time and along with them ; that they were even 
