DISTRIBUTION IN SPACE 125 



the temperate or temperate and tropic zones, 

 others yet again being restricted more or less 

 to the equatorial littoral. On the other hand 

 the succeeding order, the Alciformes, is limited 

 to the temperate and arctic portions of the 

 Northern Hemisphere. The Auks (in which 

 we include the Guillemots and Puffins) are 

 a special feature of the wild rock-bound coasts 

 of the northern seas, just as the Penguins 

 (although but remotely related) occupy similar 

 localities in high southern latitudes. Specially 

 remarkable in the distribution of these birds 

 is the exceptional abundance of species of 

 Puffins in the North Pacific, so many of them 

 being famous for their nuptial crests and other 

 ornaments. 



Following these we have now to consider 

 the distribution of the Falconiformes. Here 

 again we have a group of perfectly cosmo- 

 politan birds, penetrating far into the Arctic 

 Regions, and well represented in every con- 

 tinent, and in almost every island of any 

 importance suited to their needs. Of the two 

 sub-orders into which the present order may 

 be naturally divided, the American Vultures 

 (Cathartae) are exclusively confined to the New 

 World. The remaining sub-order, the Accipitres, 



