ii. 221

Short-tailed burrowing snakes, ii. 373

Shrikes, ii. 272

_Sialia_, ii. 260

_Siamanga_, ii. 171

_Siaphos_, ii. 397

Siberia, climate of, i. 217

Siberian sub-region, description of, i. 216 mammalia of, i. 217 birds of, i. 219 reptiles and amphibia of, i. 220 insects of, i. 220

_Sibia_, ii. 262

_Siderone_, ii. 474

_Sieboldia_, ii. 412

_Sigmodon_, ii. 230

_Silondia_, ii. 442

_Silphomorpha_, ii. 490

_Silubosaurus_, ii. 397

_Siluranodon_, ii. 442

_Silurichthys_, ii. 441

SILURIDÆ, ii. 441

_Silurus_, ii. 441

_Silybura_, ii. 374

_Simenia_, ii. 197

_Simia_, ii. 171

SIMIIDÆ, ii. 170

_Simocephalus_, ii. 380

_Simocyon_, Miocene of Greece, i. 115