490 
INDEX 
Pedetidae, 372, 373 
Pellegrinia, 372 
Pelobates, 204 ; syriacus, 221 
Pelobatidae, 204, 221 
Pelodytes, 221 
Penhallow, Pleistocene flora of 
Canada, 43, 44 
Pentalagus, 225 
Peratherium, 367 
Perch, absent from western States, 198 
Percidae, 198 
Peripatus, range and origin of, 345— 
347, 362, 432 ; eiseni, 346 ; goudoti, 
346 ; tholloni, 369 
Permanence of ocean basins theory, 
214—232, 272—281, 321—333 
Perodipus, 201 
Peromyscus, maniculatus, 27 ; sit- 
kensis, 92 
Peru, geological history of, 359 ;■ 
poverty of freshwater fauna, 405 
Peschel, meaning of term “ relict 
lake,” 49 
Petersen, Polar centre of distribu¬ 
tion for butterflies and moths, 22 
Petromys, 372 
Pezzotettix, glacialis, 36; borealis, 36; 
frigida, 36 
Pfeffer, sub-universal distribution of 
species, 374, 375 ; distribution of 
Lepidosirenidae, 378 
Phaeolaema, 350 
Phasmidae, 158 
Philomycus, 412 
Philonthus, 391 
Philoscia, bermudensis, 190 ; couchi, 
190 
Philyra pisum, 93 
Phlaocyon, 151, 152 
Phoca, 280 
Phragmatobia Juliginosa, 214 
Phrynosoma, 127, 202 
Phyllodactylus tuberculosus, 304 
Pica, rustica, 87 ; nutalli, 88 
Pickard-Cambridge, Central Ameri¬ 
can spiders, 258 ; spiders of St. 
Helena, 388, 389 
Pigidium rivulatum, 361 
Pike, as evidence of old land-connec¬ 
tion of America with Asia, 83 ; 
“bony,” 89 ; in Mississippi, 163, 164 
Pilsbry, mollusks of Florida, 175, 
176 ; mollusks of Bermuda, 191— 
193 ; on eastern and western faunal 
provinces, 198 ; family Helicidae, 
205, 206, 212 ; on Arionidae, 212, 
213 ; on Urocoptidae, 267, 268 ; 
geological history of Antilles, 267 ; 
on groups of Bulimulus, 270, 307 ; 
on Pacific continent, 322, 323 ; dis¬ 
tribution of Achatinidae, 380 ; mol- 
lusca of St. Helena, 390 ; Chilo- 
nopsis, 390 ; convergence among 
Bulimuli, 410 ; Helicigona and 
Arianta, 411 
“ Pine-barren ” flora, 140, 141 
Pinicola, 56 
Pipa americana, 377 
Pirie, sedimentary rocks in South 
Orkneys, 433 
Pitymys, range implying great anti¬ 
quity, 223, 224 ; incertus, 223 ; 
quasitor, 224 ; pinetorum, 224 ; 
nemoralis, 224 
Placostylus, 209, 307 
Plagiodontia, 282, 283 
Plagiola, 254 
Planorbis, nathorsti, 21 ; arcticus, 21 ; 
noronhensis, 385 
Plants, as tests of climate, 43, 175 ; 
in Pleistocene beds, 44 ; of Rocky 
Mountains, 114 ; common to eastern 
States, Japan and Himalayas, 139 ; 
affinity in mid-Cretaceous times be¬ 
tween Argentina and Dakota, 414 ; 
common to Rocky Mountains, and 
southern South America, 415 
Platatherium, 113 
Platygonus, 153 
Plectocyclotus, 268 
Plekocheilus, aurissileni, 269 ; aula- 
costylus, 269 
Plestiodon, 123 
Plethodon, 412 ; cinereus, 31 
Pleurodonte, 272 
Pliauchenia, 153, 407 
Plover of St. Helena, 387 
Plutonium, 350 
Pocock, myriopods of Bermuda, 189 ; 
distribution of scorpions, 382 ; on 
affinity between western North 
America and Argentina, 412 
