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English: Cephalaspis lyellii (Old Red Sandstone, Scotland).
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Ffynhonnell Nicholson H. A. The ancient life-history of the Earth. A comprehensive outline of the principles and leading facts of paleaontological science. Edinbourgh, London: WIlliam Blackwood and sons, 1877. Reprint
Awdur Henry Alleyne Nicholson (1844–1899) (drawn after Page)

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cyfredol18:12, 7 Gorffennaf 2014Bawdlun y fersiwn am 18:12, 7 Gorffennaf 20141,800 × 800 (143 KB)Mithrilwhitenning, higher resolution
17:01, 30 Gorffennaf 2008Bawdlun y fersiwn am 17:01, 30 Gorffennaf 2008508 × 219 (16 KB)FunkMonk== Summary == {{Information |Description=Fig. 103.—Cephalaspis Lyellii. Old Red Sandstone, Scotland. (After Page.) |Source=http://www.gutenberg.org/files/14279/14279-h/14279-h.htm |Date=October 2, 1876 |Author=H. ALLEYNE NICHOLSON |Permission= |other_

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