XXX 



LIST OF PLATES AND MAPS 



Fig. 

 331- 



333- 



338- 

 339- 

 352- 



353- 

 360. 



363- 



364- 



37°- 

 37^- 

 37.V 

 378. 



381. 



384- 

 386. 



387. 

 389- 

 390- 

 391- 

 394- 

 406. 



439- 

 445- 

 446. 



447- 

 461. 



466. 

 467. 

 470. 

 484. 

 487- 



vallev and solitary trees in de 



Prairie (meadow) with fringing- forest in 



pressions, Woodburg, West Iowa ...... 



Upland prairie in Iowa, Plymoufh Co. Cultivated land in the background 



Algerian Sahara. Stony desert near Biskra 



Algerian Sahara. Sandy desert. The great Chott Mebrir . 

 Trans-Caspian desert, Kara-bugaz, Jelgunn. Salsolaceae . 

 Trans-Caspian desert. Landscape north of Krasnovodsk, near the Uchok well 

 Sonth-west African desert : Great Nama Land. Guos, watering-place between 



Angra Pequena and Aos. Sandy plain with Euphorbia sp. . 

 South-west African desert. Welwitschia mirabilis on a sandy stony plain to 



the north of Tsoaaub, Damara-land ....... 



South-west .\frican desert. River bed of the KhuSub near Gagugam. Nama 



Land ... .......-•• 



Mohave desert in Southern California. Yucca brevifolia . . . . 



North .American desert. Cereus giganteus in the Gila desert 



Rocky desert in North-west Arizona. Great Cation of the river Colorado . 



'Big Bad Lands' of South Dakota, seen from the summit of the Sheep 



Mountain ............ 



'Bad Lands' in South Dakota. Bare hills, with a few grassy tracts in the 



intervening little valleys ......... 



'Big Bad Lands' of South Dakota. In the background: Sheep Mountain 

 Dry desert-like steppe, Sybil river, Wyoming ...... 



Mexican semi-desert near Venadito ........ 



Me.xican desert near .Saltillo. Echinocereus conglomeratus 



Mexican semi-desert. Agave au'l Cereus ingens ..... 



Mexican semi-desert, San Geronimo, near Tehuacan ..... 



Florida. Double row of dunes near Daytona ...... 



Tundra and mountains on the coast of Novaya Zemlya, south of Matochkin 



Strait 



In the Bolivian puna ........... 



Basal region of the eastern declivity of Orizaba. Mexico . . . . 



Montane region of Orizaba, Mexico. Temperate rain-forest 

 Popocatepetl 



640 



Montane region, upper belt, and Alpine region, lower belt, of the South 

 Island of New Zealand, at 660 meters above sea-level. Valley of the 

 river Craigieburn ........ 



Alpine floi a of New Zealand. Cr.iigieburn Mountains 



Alpine flora of New Zealand. Craigieburn Mountains 



Montane region of .\lgerian Atlas. Cedars at Teniet el Haad . 



Rocks in Heligoland at ebb tide. Fncus serralus 



Rock marine vegetation in Heligoland 



to follow figs. 445-6 



MAPS 



Annual Rainfall. 



Rain Chart of the Earth. Distribution of Atmospheric Precipitations according to the Seasons. 

 Distribution of the most important Types of Formations on the Eartli's Surface. 

 Distribution of the Formations in North America, exclusive of Mexico. 



