ve! INTRODUCTION. 
considered to include Affghanistan and Belookistan, together with 
the Himalaya Mountains; the latter sometimes specially named 
instead of the wider name of India. Unfortunately, the Flora 
Indica by Drs. Hooker and Thompson, and the almost equally 
important Flora Orientalis by Boissier, are yet only in their first 
volume, perhaps towards half a dozen which may be required to 
complete those valuable works on the same scale as volumes first. 
And the botanical data for West Asia and India are otherwise 
widely scattered, and sparingly within reach of the present writer. 
Siberia is the vast Russian territory stretching across Northern 
Asia, from the Ural Mountains to the Sea of Ochotz. 
The Seventh line is more miscellaneous or inclusive than either 
of the two preceding lines. North Africa with some of its islands 
will come into the first portion of the line. For this division the 
Algerian Flore and Cutalogue of Munby will be preferentially 
relied upon; ‘ Algeria’ being thus often named to represent North 
Africa, with or without a second habitat added. The Canaries 
must be understood to include Madeira and its islets, sometimes 
recognized by geographers as a second and distinct small group ; 
but too many subdivisions would here prove inconvenient and 
unnecessary. The Azores, however, are kept distinct; being in 
the latitude of South Europe, and lying wide apart from the 
Canaries and Madeiras. — The remainder of line seventh will be 
devoted to America and the insular lands between America and 
Scandinavia. The British Isles would be the intermediate stage 
between the Southern and Northern Isles, the African and Sub- 
arctic. The name of America will be taken to include all the 
United States and British territories eastward from the Rocky 
Mountains. The name of Columbia will be taken to represent all 
Western America, from the Aleutian Isles to the Rocky Moun- 
tains, southward to the borders of Mexico, northward to the shores 
of the Arctic Ocean through Behring’s Straits. Greenland, Ice- 
land, Faroe are named apart, abbreviated or otherwise according 
to space in the line. And in this, as in either of the two pre- 
ceding lines, any space left on account of much restricted distri- 
bution, will occasionally be utilized ly naming other habitats, or 
