Claypole's Bibliography. 43 
The Clinton Shales of Pennsylvania. Amer. Phil. Society. 
Preliminary notes on Fossil Fishes in Silurian Rocks. American 
Naturalist. 
Clinton and other Shales. Proc, Amer. Assoc, Adv. Sci. 
Pennsylvania before and after the elevation of Appalachian 
Mountains. Proc, Amer. Assoc, Adv. Sci. 
Dalmanites? cuyahoga, Akron, Ohio. Geological Magazine. 
1885. 
A Pteraspidian Fish of Upper Silurian of North America. Geo- 
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A Pteraspidian Fish of Upper Silurian of North America. “(mer- 
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Vertical Range of Certain Species. America Naturalist. 
Perry County. Vol. 1. Report of Progress. Second Geological 
Survey of Pennsylvania. F2:435 pages, illustrated by 48 page 
plates and two colored maps. 
Perry County. Vol, 11. Paleontology. Second Geological Sur- 
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1886. 
Report on some Fossils from lower Coal Beds. Ii"yoming Hist. 
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Preliminary note on some fossil wood from the Carboniferous 
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Buffalo & Chicago. Proc. Amer, Assoc. Adv. Sci., p. 224. 
[he deep Well at Akron, Ohio. Proc. Amer. Assoc. Adv. Sci., 
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Buffalo and Chicago, or What Might Have Been. meritcan Nat- 
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Wyoming Flist. and Geol. Soc. 
1887. 
Material of the Appalachians. American Naturalist. 
Organic Variation Indefinite, not Definite, in Direction. Proc. 
Amer. Phil. Society. Yj 
Lake Age in Ohio. Maclachin & Stewart Edinburgh Simpkin 
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Lake Cuyahoga, a study in Glacial Geology. Proc. Amer. Assoc. 
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The Four Great Sandstones of Pennsylvania. Proc, Amer. slssoc. 
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What’ is it? Proc. Amer. Assoc. Adv. Sci., p. 312. New York 
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Variation. Proc. Amer. Phil. Socicty. 
Paradise found. A Review. Universalist Quarterly Review. 
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Darwin and Geology. American Geologist. 
Subterranean Commotion in Akron, Ohio. American Geolegist. 
Nature of Natural Gas. American Geologist 
