1038 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
1841.—Hays,I. [On fossil bones of mastodon.] < Proc. Am. Philos. Soc. Phila, ii, 1841, pp. 102, 103. 
Hays, I. [On Tetracaulodon.] < Proc. Am. Philos. Soc. Phila. ii, 1841, pp. 105, 106. 
Horner, W.E. [Corrects paper on the dental system of mastodon.] < Proc. Am. Philos. Soc: 
Phila. ii, 1841, pp. 6,7. 
1843.—Hays, I. “On the family Proboscidea, their general character and relations, their mode of 
dentition, and geological distribution.” < Proc. Am. Philos. Soc. Phila. iii, 1843, pp. 44-48. 
Horner, W. HE. Remarks on the dental system of the mastodon, with an account of some lower 
jaws in Mr. Koch’s collection, St. Louis, Missouri, where there is a solitary tusk on the right 
side. < Trans. Am. Philos. Soc. Phila. n. s. viii, 1843, art. iv, pp. 538-59. 
Horner, W.E., and Hays, I. Description of an entire head and various other bones of the 
mastodon. < Trans. Am. Philos. Soc. Phila. n. s. viii, 1843, art. 11, pp. 37-48. 
Kaup, J.J. Bemerkungen iiber drei Arten Mastodon und die drei Arten Tetracaulodon des 
Herrn Isaak Hays. < Archiv fiir Naturg. ix, 1843, pp. 162-175. 
1844.—Owen, R. Description of a fossil molar tooth of a mastodon discovered by Count Strzlecki in 
Australia. <Ann. Nat. Hist. xiv, 1844, pp. 268-271; Calcutta Journ. Nat. Hist. v, 1845, pp. 
572-576. 
1846.—Jackson, J. B.S. [On bones of Mastodon giganteus from a marl pit on Schorley’s Mountain, 
N. J.J] <Proe. Boston Soe. Nat. Hist. ii, 1846, pp. 60-62. 
Shurtleff, N. B. [On the skeleton of Mastodon giganteum from a marl-pit near Newburg, N. 
Y.] < Proc. Boston Soc. Nat. Hist. ii, 1846, pp. 96-98. 
Shurtleff, N. B. [On some peculiarities of the skeleton of Elephas indicus.] < Proc. Boston 
Soc. Nat. Hist. ii, 1846, pp. 116-118. 
——,—. Mastodon giganteus. <Am. Journ. Sci. and Arts (2), ii, 1846, pp. 131-133. 
———,—. The mastodon of Newburg, N. Y., discovered in August, 1845. < Am. Journ. Sci. 
and Arts (2), 1, 1846, pp. 268-270. 
1847.—Gray, A. Food of the mastodon. < Am. Journ. Sei. and Arts (2), iii, 1847, p. 436. 
[From Proc. Bost. Soc. 1846, p. 92.] . a 
Owen, R. General geological distribution and probable food and climate of the mammoth. 
<_Am. Journ. Sci. and Arts (2), iv, 1847, art. ii, pp. 13-19. 
(‘‘ Extracted from Prof. Owen's British Fossil Mammalia”, 1846.] 
1848.—Warren, J. C. [On a tooth of Mastodon gigantens from Oregon and on M. angustidens.] 
< Proc. Boston Soc. Nat. Hist. iii, 1848, pp. 41, 42. 
1849.—Cabot, G. [Doubts respecting the alleged geographical distribution of Mastodon angustidens. ] 
< Proe. Bost. Soc. Nat. Hist. iii, 1849, p. 104. 
Christol, J. de. Classification paralléle des pachydermes & molaires sans cément et & molaires 
avee cément. <(Comp. Rend. Acad. Sci. Paris, xxix, 1849, pp. 363-366; Institut, xvii, 1849, 
no. 822, p. 313. 
Desor, E. [On a fine skeleton of a mastodon at Galena, Mo.] < Proc. Boston Soc. Nat. Hist. 
iii, 1849, p. 207. 
Gould, A. A. [On the nature of the Ohio clay formation containing the mastodon bones. ] 
< Proc. Bost. Soc. Nat. Hist. iii, 1849, pp. 117, 118. 
Pickering, C. [On the distribution of the mastodon.] < Proc. Bost. Soc. Nat. Hist. iii, 1849, 
Dell Ove lee 
Warren, J.C. [On the geological position of the Mastodon giganteus.] < Proc. Bost. Soc. 
Nat. Hist. iii, 1849, p. 111. ; 
Warren, J.C. [Presentation of a cast of a cranium of a young mastodon.] < Proce. Bost. Soc. 
Nat. Hist. iii, 1849, p. 209. 
Wyman, J. [On the number of species of mastodon.] < Proc. Bost. Soc. Nat. Hist. iii, 1849, 
p- 104. 
1850.—Agassiz, L. On the fossil remains of an elephant found in Vermont. < Proc. Am. Assoc. Ady. 
Sci. ii, 1850, pp. 100, 101. 
Gibbes, R.W. Remarks on the northern Elephas of Prof. Agassiz. < Proc. Am. Assoc. Adv. 
Sei. ili, 1850, p. 69. : 
Warren, J.C. On the Mastodon angustidens. < Proc. Am. Assoc. Adv. Sci. ii, 1850, pp. 93-95. 
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