_References on migration._--Dobbs, 1774: 20, 22; Hearne, 1795: 39, 40, 56, 66, 74, 85-87, 286, 299; Franklin, 1823: 241-242; Sabine, in Franklin, 1823: 667; Richardson, “1825”: 328-329, and 1829: 242-243; Godman, 1831, +2+: 283-284; John Ross, 1835a: 328, 330, 337, 376, 390, 529-530, 628; J. C. Ross, in John Ross, 1835b: xvii; Richardson, in Back, 1836: 498; Simpson, 1843: 76, 196, 233, 277, 301, 320-321, 328, 386; Rae, 1850: 93; Richardson, 1852: 290, 296; Rae, 1852a: 79; J. Anderson, 1857: 326, 328; Murray, 1858: 203; Richardson, 1861: 274, 275; B. R. Ross, 1861: 438-439; Osborn, 1865: 223-224, 226; Kumlien, 1879: 54; R. Bell, 1881: 15C; Caton, 1881: 108; Gilder, 1881: 196-197; Nourse, 1884: 235, 356; Schwatka, 1885: 77-79, 83; Boas, 1888: 502; Collinson, 1889: 244, 290; Pike, 1917 (1892): 48-49, 50, 89-91, 101, 174, 204, 209, 220; J. B. Tyrrell, 1892: 128-130; Dowling, 1893: 103, 107; J. B. Tyrrell, 1894: 442, 1896: 13, 63, and 1897: 10, 19, 21, 49-50, 76, 124, 140, 142, 165; Russell, 1895: 48, and 1898: 88, 226; Whitney, 1896: 157, 238, 241; Lydekker, 1898: 48; J. W. Tyrrell, 1908 (1898): 77-78, 80; Jones, 1899: 368, 374; Hanbury, 1900: 66-67, 69, 71; A. J. Stone, 1900: 50, 53; W. J. McLean, 1901: 5, 6; Elliot, 1902: 259, 260, 274-275; Preble, 1902: 42; J. W. Tyrrell, 1924 (1902): 26, 31; Hanbury, 1904: 10, 30, 32, 34, 58, 93, 108, 120, 121, 139; Hornaday, 1904: 137; Stone and Cram, 1904: 52; MacFarlane, 1905: 683-685; J. A. Allen, 1908a: 490; Amundsen, 1908, +1+: 97, 102-106, 200, 247, 326-329; Preble, 1908: 137-139; Cameron, 1912: 127; Wheeler, 1912: 199-200; R. M. Anderson, 1913a: 6, and 1913b: 502; Stefánsson, 1913a: 94-96, 99, 100, 103, 106, 1913b: 203-204, 224-225, 263-265, 269, 294, 348-350, and 1914: 39, 41, 54; Chambers, 1914: 93; Hornaday, 1914, +2+: 101-104; Wheeler, 1914: 58; Harper, 1915: 160; Camsell, 1916: 21; Thompson, 1916: 99-101; Kindle, 1917: 107-108; Camsell and Malcolm, 1919: 46; Whittaker, 1919: 166-167; Buchanan, 1920: 105-108, 128-129; Hewitt, 1921: 60-63; Stefánsson, 1921: 401; Jenness, 1922: 15, 17, 25-26, 125; Blanchet, 1925: 32-34, and 1926b: 46-48; Mallet, 1926: 79; Preble, 1926: 137-138; Rasmussen, 1927: 54, 214-217, 246; Birket-Smith, 1929 (1): 51, 56, 101, 106; Seton, 1929, +3+: 122, 125-128; Blanchet, 1930: 49-52; Critchell-Bullock, 1930: 58, 192-196; Hoare, 1930: 13, 14, 16, 21, 22, 27, 31, 33, 36-38; Kitto, 1930: 87; Mallet, 1930: 20-23, 27; Jacobi, 1931: 80-84, 192-210; Harper, 1932: 30, 31; Munn, 1932: 58; Sutton and Hamilton, 1932: 79, 81; Weyer, 1932: 40; Birket-Smith, 1933: 91-94, 112, 118; Ingstad, 1933: 34, 134-135, 156-159, 161, 163, 225, 229-231, 280, 291, 293, 296, 324; Weeks, 1933: 65; R. M. Anderson, 1934a: 81, 1937: 103, and 1938: 400; Hornby, 1934: 105-107; Birket-Smith, 1936: 91; Hamilton, 1939: 244-247, 359; Murie, 1939: 244; Clarke, 1940: 8-9, 11, 85-100; G. M. Allen, 1942: 298-299; Soper, 1942: