_Helix_, 4
_acuta_, 102, 298
_aculeata_, 298
_aspersa_, 24, 195
_ericetorum_, 298
_fusca_, 298
_lapicida_, 4
_obvoluta_, 4, 297
_pisana_, 102, 298
_pomatia_, 15, 32, 195, 262
_revelata_, 102
_rotundata_, 122, 274, 298
_ruderata_, 212-213

Herdman, W. A., and Lomas, J., 236

Herring, origin of, 143

_Heteromeyenia Ryderi_, 94

Hofman, E., 54

Hooker, Sir J., 99, 161

_Hopatroides thoracicus_, 268

Howorth, Sir H., 73

Hyalinia, antiquity of, 50

_Hyla_, 260
_arborea_, 260-261, 280
_chinensis_, 260

Ice-Age, climate of, 65, 81

Ice-bridge, migration on, 108

_Idotea entomon_, 178, 224

Ihering, H. von, 19, 20, 24-25

Indigenous species, 10

Inter-glacial deposit, the Forest-Bed an, 70
periods, climate of, 181, 218

Introduced species, 10, 23, 27-29

Introduction by man, 32-33

Introductions from America, 24

Ireland, glaciation of, 129

Irish and Scotch Hare, 136
Elk, 108, 251-252

Irish fauna, composition of, 63
Stoat, 136

Isle of Man, fauna of, 123

_Isotoma littoralis_, 94

Jeffreys, J. G., 27

Jerboa, 204

Jordan, H., 103

Judd, J. W., 61

Karpinski, H., 222

Kendall, P. J., 125

Kendall, P. J., and Bell, A., 174

Kennard, A. S., 167

Kennard, A. S., and Woodward, B. B., 4

Kessler, H., 222

Kew, H. W., 17, 23, 32

Killarney fern, 115

Kinahan, G. H., 107-108, 129

Kirkdale Cavern, remains in, 54

Kobelt, W., 49, 56, 58, 62, 75, 195-196, 212, 281, 297, 303, 321-323

Koeppen, F. T., 51, 62, 222, 248

Krasan, F., 347

_Lagomys_, origin of, 41, 203

_Lagopus_, 334
_albus_, 91, 142, 334
_hyperboreus_, 334
_leucurus_, 335
_mutus_, 91, 142, 334
_rupestris_, 334
_scoticus_, 334

_Laminifera_, sub-genus of _Clausilia_, 48

Lamplugh, G. W., 107-108

Land-connection between America and Northern Europe, 61
British Islands and France, 59-60
British Islands and Scandinavia, 61
Europe and North Africa, 61
Europe and North America, 61, 168-172
Greece and Asia Minor, 61
Greenland and Europe, 155, 159
Ireland and Spain, 110

Land Mollusca, migrations of, 9

Land shells, West Indian, 21

Lartet, E., 51, 73, 107, 150

Lemming, range of, 138-140

_Leontopodium alpinum_, 266, 342

_Lepus_, 27, 29, 31
_alpinus_,