ii. 246

_Pachyura_, ii. 191

_Pæocephalus_, ii. 328

_Pæcilus_, ii. 489

_Pagellus_, ii. 427

_Pagomys_, ii. 204

_Pagophila_, ii. 364

_Pagophilus_, ii. 204

_Paguma_, ii. 195

PAICTIDÆ, ii. 298

Palæarctic region, ancient limits of, ii. 157 defined, i. 171 subdivisions of, i. 71 general features of. i. 180 zoological charcteristics of, i. 181 has few peculiar families, i. 181 mammalia of, i. 181 birds of, i. 182 high degree of speciality of, i. 184 reptiles and amphibia of, i. 186 fresh-water fish of, i. 186 summary of vertebrata of, i. 186 insects of, i. 186 coleoptera of, i. 187 number of coleoptera of, i. 189 land-shells of, i. 190 sub-regions of, i. 190 general conclusions on the fauna of, i. 231 tables of distribution of animals of, i. 233

_Palæacodon_, N. American Tertiary, i. 133

_Palæetus_, European Miocene, i. 162

_Palægithalus_, European Eocene, i. 162

_Palælodus_, European Miocene, i. 162

_Palæocastor_, N. American Tertiary, i. 140