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Owen Hist. of British Fossil Mammals. 1846

p. 447 Irish Elk Megaceros Hibernicus Span of Antlers between extreme tip 8 feet of -Great American Moose Alces palmata var. Americana 4 feet.

p 455 Weight of skull & Horns 87 lb. - average weight of skull 5 1/4 pounds - says pair of weigh 60- 70 lb in weight

Richardson p. 236 Horns of Moose 50 or 60 lb

Owen, Richard. 1846. A history of British fossil mammals and birds. London: John Van Voorst. PDF Darwin cited this in Descent 2: 259, n30: "Richardson, 'Fauna Bor. Americana,' on the moose, Alces palmata, p. 236, 237; also on the expanse of the horns 'Land and Water,' 1869, p. 143 See also Owen, 'British Fossil Mammals,' on the Irish elk, p. 447, 455."

Richardson, John. 1829-1836. Fauna Boreali-Americana, or, The zoology of the northern parts of British America: containing descriptions of the objects of natural history collected on the late northern land expeditions, under command of Captain Sir John Franklin. 3 vols. London: John Murray. vol. 1 Text vol. 2 Text vol. 3 Text