LIST OF WORKS REFERRED TO IN THE TEXT.

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Agassiz, S. (88) Three Cruises of the U. S. Coast and Geodetic Survey Steamer “Blake” in the Gulf of Mexico, in the Caribbean Sea, and along the Atlantic Coast of the United States, from 1877 to 1880. London, 1888.

Andrae, K. J. (53) Fossile Flora Siebenbürgens und des Banates. Abhand. k. k. geol. Reichsanst. Bd. II. Abth. III. No. 4, 1853.

Andrussow, N. (87) Eine fossile Acetabularia als Gestein-bildender Organismus. Ann. k. k. nat. hist. Hofmuseum, Wien. Bd. II. Heft II. p. 77, 1887.

d’Archiac, E. J. A. (43) Description géologique du département de l’Aisne. Mém. Soc. Géol. France, vol. V. pt. II. p. 129, 1843.

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