. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. Fig. 68. — Upper Silurian Brachiopods. aa, Leptocoelia plano-convexa, Clinton Group, America ; b b', Rkynchonella neglecta, Clinton Group, America; c, Rhynchonella cuneata, Niagara Group, America, and Wenlock Group, Britain; d d', Orthis elegan- tula, Llandeilo to Ludlow, America and Europe; e e', Atrypa hemispherica, Clinton Group, America, and Llandovery and May Hill Groups, Britain ;//', Atrypa co7igesta, Clinton Group, America ; gg', Orthis Davidso
. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. Fig. 68. — Upper Silurian Brachiopods. aa, Leptocoelia plano-convexa, Clinton Group, America ; b b', Rkynchonella neglecta, Clinton Group, America; c, Rhynchonella cuneata, Niagara Group, America, and Wenlock Group, Britain; d d', Orthis elegan- tula, Llandeilo to Ludlow, America and Europe; e e', Atrypa hemispherica, Clinton Group, America, and Llandovery and May Hill Groups, Britain ;//', Atrypa co7igesta, Clinton Group, America ; gg', Orthis Davidsoni, Clinton Group, America. (After Hall^ Billings, and the Author.) (fig. 68, <?), Leptoccelia (fig. 68, a), Rhyncho7iella (fig. 68, b^ c), Meristella (fig. 69, a, e,f), Athy7-is, Hetzia, Chonetes, & Fig. 69.—a, a' Meristella intermedia, Niagara Group, America; b, Spirifera Niagar- ensis, Niagara Group, America ; c, c , Spirifera crispa, May Hill to Ludlow, Britain, and Niagara Group, America ; d, Stropho7nena {Streptorkynchus) stibplana, Niagara Group, America ; e, Meristella naviformis, Niagara Group, America ;/, Meristella cylindrica, Niagara Group, America. (After Hall, Billings, and the Author.) The higher groups of the Mollusca are also largely repre- sented in the Upper Silurian. Apart from some singular types,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nicholson, Henry Alleyne, 1844-1899. New York, A. L. Fowle
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Keywords: ., bookcentur, bookdecade1870, booksubjectpaleontology, bookyear1876
