GEOGRAPHICAL DISTRIBUTION OF CRUSTACEA. 15 31 



the greater part of the information furnished us by the present state 

 of science, with reference to the distribution of Crustacea in the diffe- 

 rent parts of the globe. 



We divide the surface of the globe, for marine zoological geography, 

 into three sections, the Occidental, the Africo-European, and the Oriental; 

 the first, including the east and west coasts of America and adjoining 

 islands ; the second, the eastern side of the Atlantic Ocean, the coasts of 

 Europe, and also of Africa as far as the Cape of Good Hope; the third, 

 embracing the Indian Ocean and its coasts and islands, the East 

 Indies, and the Pacific Ocean, with its coasts and islands, exclusive of 

 the western coast of America and the neighbouring islands. The total 

 number of species in each is given in a separate column. 



In the Occidental section, under the head of Western America, there 

 are two columns; one (N.) for the coast north of the equator; the 

 other (S.) for the coast south, together with the Gallapagos. 

 ^ Under the head of Eastern America, there are the same two divi- 

 sions of north and south. Fuegia is included in Eastern instead of 

 Western America. 



In the Africo-European section, we make three columns ; one (N.) 

 for the coast of Europe and Africa, north of the equator; and the 

 adjacent islands, the Cape Verdes, Canaries, and Azores; a second 

 (Med.) for the Mediterranean Sea; a third, for the coast of Africa 

 south of the equator to the Cape of Good Hope, with the islands, Ascen- 

 sion, St. Helena, and Tristan d'Acunha. 



A separate column is devoted to species in the north frigid region 

 of the Atlantic. 



In the Oriental section, there are the divisions (1), East Africa, 

 with the columns north (N.), and south (S.), the latter including 

 Madagascar, Isle of France, and other islands near the African coast; 

 (2), Indian Ocean and the East Indies, including the coast of Southern 

 Asia, the islands of the oceans south, with Torres Straits and north- 

 western Australia; (3), the Western Pacific, including Japan and other 

 regions north of the equator, for one column, and for the other, the islands 

 and shores in the Western Pacific south of the equator, embracing New 

 Ireland, Eastern Australia, Van Diemens Land ; (4), the Middle Pacific, 

 divided into north and south, and embracing the various islands over this 

 ocean exclusive of those just mentioned, with New Zealand, the 

 Aucklands, &c, on the south. 



Under each subdivision, we designate the particular temperature 



