Page:The Habitat of the Eurypterida.djvu/10

	11.	The Old Red Sandstone—continued						PAGE
				Deposition in Lakes				177
				Deposition in the Sea				179
			Objections to Lake and Marine Theories					180
				1.	Physical			180
						(a)	Red Color	180
						(b)	Marine Denudation	181
						(c)	Salt Indicative of Marine Deposition	182
						(d)	Thickness of Deposits	182
						(e)	Structural Features	184
				2.	Faunal			184
			Summary					186
			Theory of Fluviatile Deposition					186
				Summary of evidence of Fluviatile Deposition				189
					(a)	Lithogenesis		189
					(b)	Faunal		191
	12.	Miscellaneous Occurrences						193

Chapter V. The Geological and Geographical Distribution of the Eurypterids and the Conditions of Migration				200
	Summary of Facts Observed Regarding the Distribution of the Eurypterids			200
	Migration and Dispersal of Recent Fluviatile Organisms			203
		A. Species Identical in Distant Continents		203
		B. Genera Identical in Distant Continents		204
		C. Families Identical in Distant Continents		204
		Summary		205
	Application of Principles Deduced from Modern Faunal Distribution			207
	Migration and Distribution of the Eurypterids			212
		Theory of Early Marine Habitat and Routes of Migration		212
		Objection to Marine Habitat Theory		212
		Theory of River Habitat		216
		The Eurypterid Faunas Considered by Continents		217
		The Eurypterid Faunas of Appalachia		217
			Comparison of Pittsford and Shawangunk Faunas	225
		Summary of Facts of Distribution in Continent of Appalachia		226
		The Eurypterid Faunas of Atlantica		228
			Comparison of Pittsford-Shawangunk and Bertie Faunas	229
			The Upper Siluric Faunas of the Baltic Region	236
			The Fauna of the Wenlock	238
			Summary of the Wenlock Faunas	242
			The Fauna of the Ludlow	242
			The Old Red Sandstone Fauna	247
		Summary of Facts of Distribution on Continent of Atlantica		253
		The Eurypterid Fauna of Mississippia		253
Concluding Remarks				256
Bibliography				257