illustrating the Distribution of Marine Animals. 209 



Portugal to latitude 42° north, having a width of five de- 

 grees. It thus corresponds on this coast to the so-called 

 Lusitanian Region, 



The southern includes the mouth of the La Plata on one 

 side, and on the other the coast near Cape Town, beyond 

 which it extends to the Cape of Good Hope, or rather to Cape 

 Lagulhas. 



Atlantic Cold Temperate Regions, between 50° and 44° F. 

 — The coast from Cape Cod to Cape Hatteras, belongs to the 

 Northern Cold Temperate Region. Passing easterly, this 

 region is but a narrow line of water for thirty degrees of 

 longitude, after which it expands, and finally terminates be- 

 tween Western Ireland and latitude 42° on the Spanish 

 coast. The British Channel, the Bay of Biscay, and probably 

 Vigo Bay, Spain, are within the limits of this region. 



The southern embraces the coast of South America, along 

 by Rio Negro, for about five degrees, and passes wholly to 

 the south of Africa. 



Atlantic Subfrigid Regions, between 44° and 35° F. — The 

 coast of Massachusetts, north of Cape Cod, of Maine and 

 Newfoundland, and all Northern Britain, the Orkneys, Shet- 

 lands, and Faroe Islands, pertain to the northern Subfrigid 

 Region ; while the southern includes the Falklands, South- 

 ern Patagonia, and Fuegia. 



Atlantic Frigid Regions, beyond 35° F. — Greenland, Ice- 

 land, and Norway are within the northern of these regions, 

 and the South Shetlands, Sandwich Land, and South Georgia, 

 within the southern. 



Pacific Regions. — A comparison of the regions of the At- 

 lantic and Pacific, and especially of the limits of those com- 

 mencing at the South American coasts, brings out some 

 singular facts. 



The Torrid region of the Pacific, near the American coast, 

 embraces only seventeen and a half or eighteen degrees of 

 latitude, all but one of which are north of the equator ; while 

 that of the Atlantic covers a long range of coast, and reaches 

 to 15° south. The south Subtorrid, region has a breadth of 

 about three degrees on the Peruvian coast, reaching to 4° 

 south, or probably to Cape Blanco, while that of the Atlantic 



