LIST OF ILLUSTRATIONS 



XV 



FIG. 



170. Diagrammatic representation of typical sea-marginal profile . 



171. Photomicrographs of marine phytoplanktonic communities 



172. Postelsia palmaeformis . ....... 



173. Scene at low tide on a rocky sea-shore of the eastern United States 



174. A characteristic Kelp, Alaria doUchorhachis .... 



175. A giant Pacific Kelp, Macrocystis pyrifera .... 



176. An arctic foreshore photographed from near low-tide mark . 



177. Old sand-dune colonized by shrubs and Pitch Pine after stabilization 



by Marram Grass ........ 



178. An example of Class VII land ...... 



179. An example of Class VIII land ...... 



180. Illustration of the eight land-use capability classes 



181. Part of a maze of gullies which crosses more than an entire county 



in the southern United States ...... 



182. Destructive water-erosional gully in heavily overgrazed pasture in 



Illinois .......... 



183. The same as Fig. 182, two years later .... 



184. Map showing positions of meteorological stations of the Ukraine, 



with indications of their climatic analogues in the United States 



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