3iS 



JXDEX 



Refuge Area II., British species 



resorting to in winter, 76, 77 

 Refuge Area II., species resident 



in, and in British Isles, 74 — 76 

 Refuge Area III., Table of 



emigrants from, and from Asia, 



87, 88 

 Refuge Area HI., winter quarters 



of British summer migrants in, 



82 

 Regulus cristafiiSy present emi- 

 grations of, 173 

 Reptiles and Amphibia of British 



Area, 104 

 Resident British birds, analysis 



of Table of, 146, 147 

 Resident British birds, Table of, 



144—146 

 Resident British species, 71 

 .^f'.y«;//(' of Chapters III. and IV., 



1 58— 164 

 " Retreat " of plants a myth, 299, 



300 

 Reversal of route by migratory 



birds, 267 

 R]iinoccros^ 34 

 Rliinoccros cfriiscits, 1 1 , 36 

 Rhinoceros incgarhimis, 36 

 Rose-coloured Pastor, range of, 



213 

 Route of Migration, how learnt, 



:236 

 Routes, difficulty of tracing to 



British Islands, 209 

 Routes into Scotland, absence of 



via Ireland, 219 

 Routes of Migration continuous, 



214, 215 

 Routes of Migration correlated 



with breeding grounds, 232, 233 

 Routes of Migration, how followed 



by birds, 234 

 Routes, the North Sea, 226 

 Rutt', range of, 128 

 Ruticilla plKvnicuriis^ recent emi- 

 grations of, 172 



Sahara, colonization of the, 40 

 Sahara, influence of the, on the 

 distribution of species, 31 



Sahara Sea, ancient, a bar to 

 emigration from the south, 

 82 

 St. Georges Channel, migration 



across, 224 

 St. Kilda Wren, the, 195 

 Sa/ix polaris, 12 

 Saxicola ccnant/ie, 23, 115 

 Saxicola, range of, 24 

 Scandinavian Flora, the, 295 

 Scolflpax riisticula, present emi- 

 grations of, 178 

 Sea-barriers, impassable nature 



of, 102 

 Sedge Warbler, absence of from 



South Norway, 127 

 Seebohm and Harv-ie-Brown on 

 the ^Migration of Birds in the 

 valley of the Petchora, 142 

 " Sense of direction," 237 

 Severe winters, etifects of, 165 

 Severe winters, effects of, on 



birds, 2 So, 281 

 Sitta ccesia, present emigrations 



of, 174 

 Sit/a curopcpa, 126 

 Sitta lu/iitc/icadi, 1S9, 199 

 Sociability during migration, 241 

 South Africa, the Temperate Flora 



of, 301, 302 

 Southern exodus of life during 

 Pleistocene time a myth, 53 — 



55 

 Southern Flora, inability of to 

 enter Northern Hemisphere, 



304 

 Southern Flora, the dominant, 



304 



Southern genera in Europe, the 

 presence of, 296 



Southern Migration, growing in- 

 tensity of, 263 



Southern parent species, com- 

 parative Table of, 74 



Southern Range Bases, import- 

 ance of, 166 



Southern representative forms, 

 Table of, 72 



Southern types, absence of from 

 Northern Hemisphere, 303, 304 



