1 56 TJie Anterica/i Geologist. Marcii, i89'." 
56. On the Genus Tellinomya, and Allied Genera. The Canad. 
Nat. and Geol., vol. i, pp. 390 — 395. Montreal, 1856. 8vo. 
57. Observations on the Genus Archimedes, or Fenestella, with 
Descriptions of Species, etc. Proc. Am. Assoc. Ad. Sci., loth meet 
ing, Albany, 1856, pp. 176 — 180. Cambridge, 1857. 8vo. 
58. On the Carboniferous Limestones of the Mississippi Valley. 
Ibid., pp. 51 — 69. 
59. Opening Address before the Am. Association. Ibid., pp. 230 
—232. 
60. *On some Points in the Geology of the Upper Mississippi 
Valley. Ibid., p. 226. 
61. *On the Results of Collections of Fossils during a Period of 
Ten Years in the Limestones of the Lower- Helderberg. Ibid., p. 227. 
62. Observations upon the Carboniferous Limestones of the Mis 
issippi Valley. [Abstract.] Am. Jour. Sci., 2d Ser., vol. 23, pp. 187 — 
203. New Haven. 1857. 8vo. 
63. Remarks upon the Genus Archimedes or Fenestella from the 
Carboniferous Limestones of the Mississippi Valley. Ibid., pp. 203, 
204. 
64. Observations upon the Cretaceous Strata of the United States 
with Reference to the Relative Position of Fossils Collected by the 
[Mexican] boundary (Commission. Am. Jour. Sci. and Arts. 2d Ser.. 
vol. 24. pp. 72 — 86. New Haven, 1857. 8vo. 
65. Descriptions of Palaeozoic Fossils. loth Ann. Rep. St. Cab. 
Nat. Hist., App. C, pp. 41 — 180. Albany, 1857. 8vo. 
66. *On the Cretaceous Formations of the United States and the 
North American Continent. Pro. Am. Assoc. Ad. Sci., nth meeting 
(Montreal), 1857, p. 158. Cambridge, 1858. 8vo. 
67. *On the Cafboniferous Limestones and Coal Measures of the 
United States. (Published in the Geological Report of Iowa, 1858.) 
Ibid., p. 158. 
68. ''On the Direction of Ancient Currents of Deposition, and 
the Source of ^Materials in the Older Palaeozoic Rocks, with Remarks 
on the Origin of the Appalachian Chain of Mountains. Ibid., p. 158. 
6g. Contributions to the Geological History of the American Con- 
tinent. (The address of the retiring President, delivered before the 
t'irst Montreal Meeting of the American Association for the Advance- 
ment of Science. August. 1857.) Published in the Proc. Am. Assoc. Ad. 
Sci., 2d Montreal Meeting, 1882, pp. 29 — 71. Salem, 1883. 
70. Notes upon the Genus Graptolithus. and Description of Some 
Remarkable New Forms from the Shales of the Hudson River Group, 
discovered in the Investigations of the Geological Survey of Canada, 
under the Direction of Sir W. E. Logan, F. R. S. Canadian Naturalist 
nd Geol.. vol. 3. jip. 139 — 150, and 161 — 177. Montreal, 1858. 8vo. 
71. *Observations upon the Genus Graptolithus and allied .Genera. 
r'roc. Ani,. Assoc. .Adv. Sci., 12th meeting. Baltimore. 1858. p. 8". Cani- 
i'ridge. 1859. 8vo. 
