144 MAMMALIAN DESCENT. [LECT. V. 



GILL, THEODORE, M.D., Ph. D., " Arrangement of the Families of 



Mammals," Smithsonian Miscellaneous Collections, Washington, 



Nov. 1872, pp. 1-41. 

 " On the Genetic Relations of the Cetaceans and the Methods 



involved in Discovery," The American Naturalist, vol. vii., 



Jan. 1873, pp. 1-11. 

 HUXLEY, T. H., F.R.S., " On a New Species of Macrauchenia (M. 



bolivensis), Proc. Geol. Soc., 1860, pp. 73-84, plate vi. 

 LEIDY, Dr JOSEPH, " Contributions to the Extinct Vertebrate Fauna 



of the Western Territories," Report of the U. S. Geol. Survey of 



the Territories, vol. i., " Fossil Vertebrates," Washington, 1873. 



" The Extinct Mammalian Fauna of Dakota and Nebraska," 



Jour. Acad. of Nat. Sci. of Philadelphia, vol. vii., 2nd series, 



Philadelphia, 1869. 



" Description of Vertebrate Remains, chiefly from the Phos- 

 phate Beds of South Carolina," Jour. Acad. of Nat. Sci. of 



Philadelphia, vol. viii., Philadelphia, 1877. 

 MARSH, Professor O. C., " On the Structure and Affinities of the 



Brontotheridae," Amer. Jour, of Science and Art, vol. vii., 



Jan. 7, 1874, pp. 1-8, plates i., il 



" Fossil Horses in America," American Naturalist, vol. viii., 



May 1874, pp. 288-294. 

 " Introduction and Succession of Vertebrate Life in America," 



Address delivered before the American Association for the 



Advancement of Science, at Nashville, Tenn., Aug. 30, 1877. 

 "Principal Characters of the Coryphodontidse," Amer. Jour, of 



Science and Art, vol. xiv., July 1877, pp. 81-85, plate iv. 

 "History and Methods of Palaeontological Discovery," an 



Address delivered before the American Association for the 



Advancement of Science, at Saratoga, N. Y., Aug. 28, 1879. 

 " Notes of a New Jurassic Mammal," Amer. Jour, of Science 



and Art, vol. xviii., July 1879, pp. 1, 2. 

 "Notice of Jurassic Mammals representing Two New Orders," 



Amer. Jour, of Science, vol. xx., September 1880, pp. 235-239, 



figs. 1-2. 



In this paper Professor Marsh remarks (p. 228) : 



" Mesozoic mammals have been very generally referred to the 



Marsupialia. An examination of all the known remains of 



