|570 CRUSTACEA. 



natalensis, Kr., Platyonychus (Kraussia, D.) rugulosm, Kr., all of 

 which occur at the Hawaiian Islands.* 



Of the European species, one is the cosmopolite Qonodactylus chi- 

 ragrus, Latr. The others are Alpheus Edwardsii, and Gammarus 

 pulex, Fabr. Megalopa mutica and Hlppolyte ensiferus, also reported 

 from South Africa, do not occur at Port Natal. The American are 

 the cosmopolites Gcmiograpsus pictus, and Gonodactylus chiragrus, 

 together with E)-iphia gonagra, Edw. The Sesarma reticulata, Say, 

 and Plagusia tomentosa, Lk., also South African, are not from Port 

 Natal. 



It is obvious, therefore, that the great ocean, from the east coast of 

 Africa to the Hawaiian and Paumotu Islands, covering two-thirds of 

 the surface of the globe, makes one great kingdom, closely related in 

 its species, although including several zoological provinces and sub- 

 ordinate districts. This fact respecting the oceans is strikingly in con- 

 trast with those relating to the continents adjoining. A list of the 

 genera of Decapods peculiar to this kingdom, and others of the genera 

 and species common to this and the other two kingdoms, are given on 

 pages 1549, 1550. 



This kingdom may be viewed as consisting of three SECTIONS. 



First, the African, including the African coast to the head of the 

 Red Sea and Persian Gulf, with the adjoining islands, Madagascar, 

 Mauritius, etc. 



Second, the Asiatic, from Van Diemens Land and New Holland, by 

 the East Indies to North Japan. 



Third, the Pacific, including the Pacific Islands west of New 

 Guinea, from New Zealand to the Hawaiian Islands.f 



The principal provinces of these three sections are as follows : 



A. AFRICAN SECTION. 



1. The NATAL Province (south subtorrid), including also South 

 Madagascar, and the Isle of France and Bourbon. This region is 



* The Galene hawaiensis, D., is so closely like the G. natalensis, that we believe there 

 is not sufficient reason for considering them distinct. 



f The species of these three sections are separately presented in Table VI. The two 

 columns N. and S., under East Africa, include the AFRICAN species; the column E. 

 Indies and Indian Ocean, and the two columns N. and S., under West Pacific, the 

 ASIATIC species; the two columns N. and S., under Middle Pacific, the PACIFIC species. 



