BIBLIOGKAPHY. 17 



Ford, S. W. — Continued. 



1886a. The American Journal of Science, 3d ser., vol. 31, 1886 (June), pp. 466-467 : Notice of a new genus of Lower 



Silurian Brachiopoda. 

 1886b. The American Journal of Science, 3d ser., vol. 32, 1886 (Oct.), p. 32.5: Note on the recently proposed genus 

 Billingsia. 

 Frech, Fritz: 



1897. Additional plates (without cover or title-page) received at United States Geological Survey Library in 1897 

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 Gagel, C: 



1890. Beitrage zur Naturkunde Preussens, herausgegeben von der Physikalisch-oekonomisch Geselischaft zu_ 

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1905. Bulletin of the Roger Williams Part Museum No. 9, 1905 (May), 6 pp.: The Cambrian deposits of North 

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1907. North American Index Fossils, vol. 1, 1907. 8°. Lancaster, Pennsylvania. 

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1S40. Synopsis of the contents, of the British Museum, 42d ed., 1840. 12°. London. 

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 Groom, Theodore: 



1902. The Quarterly Journal of the Geological Society of London, vol. 58, pt. 1, 1902, pp. 89-135: The sequence 

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 GiJEiCH, G.: 



1892. Neuea Jahrbuch fiir Mineralogie, Geologie, und Palseontologie, 1892, Bd. 1, pp. 69-70: Ueber eine cam- 



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1877. United States Geological Exploration of the Fortieth Parallel, vol. 2, 1877, Descriptive geology, pp. 393- 



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1851. Report on the geology of the Lake Superior land district, by J. W. Foster and J. D. Whitney, pt. 2, 1851, 



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Senate Executive Document No. 4, 1851.) 



1859. Twelfth Annual Report of the Regents of the University of the State of New York on the condition of the 



State Cabinet of Natural History, etc., 1859, pp. 59-62: Trilobites of the shales of the Hudson River group. 



1861. Report of the superintendent of the Geological Survey of Wisconsin, exhibitin_g the progress of the work, 



1861 (Jan.), pp. 11-52: Descriptions of new species of fossils. 



1862. Report on the Geological Survey of the State of Wisconsin, vol. 1, 1862 (Jan.), pp. 1-72, 425^48. 



1863. Sixteenth Annual Report New York State Cabinet of Natural History, 1863, pp. 17-226: Contributions to 



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 1883. Second Annual Report of the State Geologist of New York for 1882, 1883. 

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 1894a. Thirteenth Annual Report of the State Geologist of New York for 1893, vol. 2, 1894, Paleontology, pp. 



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646: Table of classification of the Brachiopoda. 

 62667°— vol 51, ft 1—12 2 



