Published Woeks of James Hall. 85 



4C. * Remarks upon the Results of Extensive and Continued Collec- 

 tions of Fossil Species from a Portion of the Silurian Rocks of 

 New York, showing the Number of Species and Individuals of 

 each Species Obtained from a Limited Locality during a Period 

 of Ten Years. Ibid., p. 200. 



47. * On the Reproduction of Similar Types or Representative Species 



in Successive Geological Formations. Illustrated by a Collec- 

 tion of Species of the Brachiopoda from the Niagara and Lower 

 Helderberg Groups of the Palaeozoic Rocks of the United States. 

 Ibid., p. 290. 



48. * Red Sandstone of the Connecticut River Valley, and the Proofs 



of its Oolitic or Lia3sic Age. Ibid., p. 290. 



49. * Remarks upon the Geological Formation of the country along 



the Line of the [Mexican] Boundary Survey, based upon the 

 Examinations of Dr. Parry, made under the Order of Major 

 [W. H.] Emory. Ibid., p. 291. 



50. * The Silurian and Devonian Systems, and the Nature of the Evi- 



dence for Drawing a Line of Separation between the two Sys- 

 tems in the United States. Ibid., p. 291. 



51. * On the Western Limits of the Cretaceous Formation on the 



Northern Continent of America, as Evidenced by the Various 

 Collections that have been made by Exploring Expeditions 

 under the Direction of the Government of the United States. 

 Ibid., p. 291. 



52. * Contributions to our Knowledge of the Geology of Nebraska and 



the Mauvaises Terres. Proc. Am. Ass. Ad. Sci., 9th meeting, 

 Providence, 1855, p. 277. Cambridge, 1856. 8vo. 



53. * Notes upon the Genus Graptolithus. Ibid., p. 277. 



54. * On the Development of the Septa in the Genus Baculites, from 



the extreme Young to the Adult State. Ibid., p. 277. 



55. Descriptions of New Species of Fossils from the Cretaceous For- 



mations of Nebraska, with Observations upon Baculites ovatus 

 and B. compressus; and the Progressive Development of the 

 Septa in Baculites, Ammonites and Scaphites. J. Hall and F. 

 B. Meek. Memoirs of the American Academy of Arts and Sci- 

 ences, vol. V, new series, pp. 379-411, 8 plates. Cambridge, 

 1856. 4to. 



56. On the Genus Tellinomya, and Allied Genera. The Canad. Nat. 



and Geol., vol. 1, pp. 390-395. Montreal, 1856. 8vo. 



57. Observations on the Genus Archimedes, or Fenestella, with De- 



scriptions of Species, etc. Proc. Am. Ass. Ad. Sci., 10th 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. 

 CO. *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 Mississippi 



Valley. [Abstract.] Am. Jour. Sci., 2d Ser., vol. 23, pp. 187- 

 203. New Haven, 1857. Svo. 



