" Nasmon, 302.

" Pata, 323.

Pa.s.s north of Le, 395, 443.

" " Ruduk, 463.

Pa.s.ses across Kouenlun, 462.

" of Tibet, elevation of, 467.

Pata, 322.

Peganum Harmala, 212.

Perowskia, 178.

Perpetual snow, 482.

" in outer Himalaya, 487.

" in Tibet, 488.

" on opposite sides of pa.s.ses, 489.

Phatu pa.s.s, 444.

Phutaksha, 382.

Picea Webbiana, 86.

Pin river, 126.

Pindrow, 86.

Pinus excelsa in Rondu, 257.

" Gerardiana, 70, 73, 74.

" longifolia, 18.

Pitak, 394.

Piti, 128.

" river, 106.

Planorbis, fossil, 117, 170, 198, 220.

Pok, 124.

Poplars of Indus valley, 180.

Populus alba, 95, 207.

" balsamifera, 177.

" Euphratica, 191.

Porgyul, 101, 110.

Potato cultivation, 34.

Potentilla discolor, 412.

Prangos, 240, 266.

Pranu, 207.

Pugha, borax plain, 166.

" hot springs, 164.

" ravine, 162.

" sulphur-mine, 168.

Pulokanka pa.s.s, 170.

Quercus Ilex, 73, 347.

Quinoa, 49.

Raldang, 80.

Ramnagar, 320.

Rampur, 54.

Rangrig, 127.

Ribes glandulosum, 104.

Rocks of Banahal pa.s.s, 298.

" Butna valley, 361.