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THE VOYAGE OF H.M.S. CHALLENGER. 
XIII. North Pacific. 
Limits — Northern, lat. 50° N. 
Southern, lat. 30° N. 
Eastern, long. 120° W. 
Western, long. 160° E. 
It includes the southern extremity of 
Vancouver Island, and the Californian 
coast of North America. 
XIV. Mid Pacific. 
Limits — Northern, lat. 30° N. 
Southern, lat. 20° S. 
Eastern, long. 80° W. 
Western, long. 170° W. 
It includes the Sandwich Islands, the 
Marquesas Islands, the Low Archipelago, 
the western coast of Central America, the 
coasts of Peru. 
XV. South Pacific. 
Limits — Northern, lat. 20° S. 
Southern, lat. 50° S. 
Eastern, long. 70° W. 
Western, long. 170° W. 
It includes the island of Juan 
Fernandez, with the coast of Chili, and 
the greater part of the western coast of 
Patagonia. 
XVI. Fuegian. 
Limits — Northern, lat. 50° S. 
Southern, lat. 60° S. 
Eastern, long. 50° W. 
Western, long. 80° W. 
It includes the coasts of the southern 
extremity of Patagonia, Cape Horn, Terra 
del Fuego, and the Falkland Islands. 
Among the species obtained are the following ten, which have been already recorded 
as inhabitants of the shores of Britain : — 
Eudendrium rameum. 
Halecium beanii. 
Obelia geniculata. 
Lafoea dumosa. 
Lafoea fruticosa. 
Sertularia polyzonias. 
Sertularia operculata. 
Sertularia abietina. 
Diphasia pinaster. 
Thuiaria cupressina. 
Most of these are already known to be widely distributed along both the eastern and 
the western shores of the North Atlantic, while Lafoea fruticosa, Sertularia polyzonias, 
and Sertularia operculata had been identified with species brought from various stations 
in the Southern Hemisphere. The explorations of the Challenger however have consider- 
ably extended our knowledge of the stations in which British species occur, and have 
shown, as will be seen from the annexed table of distribution, that most of those brought 
home have a much wider range than had been suspected. It is a fact not destitute of 
interest that no less than three of these British species, Obelia geniculata, Lafoea 
fruticosa, and Sertularia polyzonias, have been brought by the Challenger from the 
Fuegian Region, and thus indicate a similarity of conditions between the northern and 
southern regions which shows itself in the appearance of the same species in both. 
