74 
A CORNIsn FAUNA. 
not longer than the carapace; remaining pairs compressed, a little 
longer and more slender than the first. 
Bell says that he has given this name to the genus because it 
was applied by Leach in MSS. in the British Museum, and 
adopted by Bowdich in his “Excursion in Madeira and Porto 
Santo.” 
Planes linneana, — Leach MSS. — Ploating Crab. 
This is a stray inhabitant of our shores, and drifted hither 
after Atlantic gales. Its projJer habitat is the Sargossa or Gulf- 
weed of Mid-Atlantic. Sloane says that it was these crabs that 
Columbus, finding alive on the Sargossa floating in the sea, con- 
cluded himself not far from some land, in the first voyage he 
made, on the discovery of the West Indies. 
In our report to the British Association on the marine Pauna 
and flora of 8. Devon and Cornwall, Mr. Couch says, “ In the 
spring of the present year, 1867, an example of the Hawk’s-biU 
Turtle was taken in the channel, at not a great distance from the 
Prench coast, and therefore not to he classed as British ; hut 
when brought alive and active into Polperro there were found, 
adhering closely under the shelter of its tail, two full grown 
examples of this crab ; the situation evidently chosen for support 
and shelter ; for from the structure of their hind legs, it does not 
appear probable that they can maintain themselves at the surface 
without the aid of some extraneous support.” 
Mr. Couch says “ a species of the Genus Grapsus is in the 
Athenaeum at Plymouth,, under the name of G. Pelagicus, by Mr. 
Prideaux, and known to Dr. Leach, but not in any published 
work. It is understood that the coILeetion in the Museum of that 
Institution is confined to specimens taken on the borders of 
Devon and Cornwall.” 
LBTJGOSIABM. 
Genus, Ebalia. — Leach, Edwa/r&s, Bell. 
Carapace rhomboidal, angles rounded, antenna) small, eyes 
having short foot-stalks. 
This is the only British genus in this family. 
Ebalia beyeeii— Bryer’s Ebalia. — Leach, Malac Brit., p. 125 ; 
Milne Edwards, Jlist. des Crust., t. 'I, p. 128. 
