THE EUROPEAN SEAS. 



155 



If we next separate the forms which may be con- 

 sidered, for the present, as characteristically Medi- 

 terranean, we find Lupa hastata, Lissa Gualteri ? 

 * Mithrax dichotoma, Herbstia nodosa, Amatkia 

 Hoiixii, Acanthonyx lunulata, several species of 

 Lambrus, Calappa granulata, Dorippe lanata, He- 

 mo I a spinifrons (barbata), H. liispida, several large 

 forms of Pagurus, Scyllarus latus, and Sguilla 

 mantis. 



Gatometopes becomes numerous here, and certain 

 southern genera make their appearance, such as 

 Ocypode ippeus, abundant at Cape de Verde, Gecar- 

 cinus, <fec. 



The Decapod Crustaceans of the Mediterranean 

 may be taken at ninety described species. Turning 

 to the south Lusitanian region, as it is represented 

 by the Canaries, we find there as many as forty 

 species, of which a great proportion, with the ex- 

 ceptions to be noticed, occur in the Mediterranean. 

 The south Celtic and the south Lusitanian Crus- 

 tacea, together with a few from the west coasts of 

 Africa, make up the assemblage of known Mediter- 

 ranean forms. The direction whence this portion 

 of the Mediterranean fauna has thus been derived 

 is, therefore, evidently western. The known eastern 

 Crustacea of this sea do not amount to one-half of 

 those to be met with in the west ; but, though less 

 numerous as to species, their relations are still 

 wholly western or Atlantic. Of the forty-three 

 species of Decapods collected by the French natu- 



