586 Annals of the Carnegie Museum. 



posited in the deep sea not far from shore. Then shortly after the beginning 

 of Calciferous time, a great continental elevation occurred carrying the Pots- 

 dam high above the sea and bringing the areas of the Quebec group near 

 the surface. Then while it was subsiding slowly, the coarse beds of the 

 Quebec group were formed, until the Potsdam was again submerged and the 

 Chazy covered a part of these, and later the Trenton and Hudson River 

 covered all. In that way he explained the break in the succession of life 

 between the Calciferous and Chazy in the shallow water deposits of these 

 formations between Allumette Island and Montreal, as well as in the Min- 

 gan Islands, " The break between the Chazy and Trenton is not so great 

 as between the Calciferous and Chazy. It is not yet certain that a single 

 species found in the marginal outcrops of the former formation in Canada 

 passes into the Chazy, while about one sixth of the Chazy species are known 

 to occur in the Birdseye and Black River." 



1864. Dawson, J. W. Canadian Naturalist and Geologist, new series. Vol. i, pp. 



363-458. Attempts to show that Arthophycus grenvillensis from the Chazy 

 at Grenville, Canada, is a crustacean burrow. 



1865. Uli. LINGS, E. Paleozoic Fossils of Canada, Vol. i. 



In this volume, published in parts from 1861 to 1865, are described a 

 large number of fossils from the Chazy formation of Canada. This volume, 

 with Decades 3 and 4 of the Geological Survey of Canada, and the article in 

 Vol. 4 of the Canadian Naturalist and Geologist, contain the greater part of 

 the contributions to the paleontology of the Chazy Limestone since the ])uhli- 

 cation of Volume I of the New York State Paleontology, 1847. 



1869. Safford, J. M. Geology of Tennessee, pp. 228-236. 



Professor Safford correlated the Blue or Maclnrea Limestone of Tennessee 

 with the Chazy and Black River of New York. In the work cited he de- 

 scribes the lithological character, thickness, distribution, and fossils of that 

 limestone. 



1872. Bii.LlNcs, E. Fossils, Probably Chazy, in the Eolian Limestone of West Rut- 

 land. American Journal of Science and Arts, third series. Vol. 4, p. 133. 

 In a letter to Prof. James D. Dana, Mr. Billings states that he has re- 

 cently received from the Rev. A. Wing, fossils from the marble quarries of 

 West Rutland, and he believes them to be Chazy. The fossils "consist of 

 numerous obscurely preserved forms like Plenroloinaria staiiiinea, small 

 encrinal joints, and a single plate of Palu-ocystites tenuiradiatus."' 



iSjg. II.\i.L, C. E. Laurentian Magnetite Iron-ore Deposits of Northern New York. 

 Thirty-second Annual Report New York State Museum Natural History, 

 pp. 133-140. 



Mentions the occurrence of a Chazy outlier at Schroon Lake Post Office, 

 ten miles from the nearest outcrop of sedimentary rocks. 



Note — Kemp refers this to the Calciferous, but found no fossils. 



1879. IIiNDE, G. J. On Conodonts from the Chazy and Cincinnati Group of the 

 Cambro-Silurian and from the Hamilton and Genessee-Shale Division of the 



