State Museum of Natural History. 



81 



Ad. Sci., 2d meeting (Cambridge), 1849, pp. 256-260. Boston, 



1850. 8vo. 



26. On the Brachiopoda of the Silurian Period; particularly the 



Leptaenidae. Ibid., pp. 347-350. 



27. On Graptolites, their Duration in Geological Periods, and their 



Value in the Identification of Strata. Ibid., pp. 351-352. 



28. Description of New Species of Fossils, and Observations upon 



some other Species previously not well known, from the Tren- 

 ton Limestone. Third Ann. Report State Cab. Nat. Hist., pp. 

 167-175, 5 plates. Albany, 1850. 8vo. 



29. * Remarks on the Geology of Mackinac, Drummond and St. 



Joseph's Islands and the Northern Shores of Lake Michigan. 

 Proc. Am. Assoc. Ad. Sci., 4th meeting (New Haven), 1850, 

 p. 354. Washington, 1851. 8vo. 



30. * Report on the Invertebrate Fossils exhibited to the Association. 



Proc. Am. Assoc. Ad. Sci., 5th meeting (Cincinnati), 1851, p. 180. 

 Washington, 1851. 8vo 



31. * Parallelism of the Palaeozoic Rocks of New York, with those of 



the Western States, and of all those with the Palaeozoic Strata 

 of Europe. Ibid., p. 59. 



32. * On the Silurian Rocks of the Lake Superior Land District. Ibid., 



pp. 64-66. 



33. * Catalogue of specimens of the Rocks and Fossils in the Gray 



Sandstone, Medina Sandstone, Clinton Group, Niagara Group, 

 Onondaga Salt Group, and a part of the Waterline Group. 4th 

 Ann. Rep. N. Y. St. Cab. Nat. Hist., pp. 119-146. Albany, 



1851. 8vo. 



34. On Drummond's Island. Proc. Am. Acad. Arts and Sciences, vol. 



II, pp. 253, 254. Boston, 1852. 



35. * Comparison of the Geological Features of Tennessee with those 



of the State of New York. Proc. Am. Assoc. Ad. Sci., 6th 

 meeting (Albany), 1851, pp. 256-259. Washington, 1852. 



36. * Remarks upon the Fossil Corals of the Genus Favosites, and 



allied Fossil Genera Favistella, Astrocerium and others. Ibid., 

 p. 306. 



37. * On the Palaeozoic Genera Trematopora, Callopora, etc. Ibid., 



p. 306. 



38. * Tracks, Trails, etc., in the Shales and Sandstones of the Clinton 



Group from Green Bay, with remarks on the thinning out and 

 reappearing of this portion of the Clinton Group. Ibid., 

 p. 306. 



