[ [11] ] 'Conchyliologie Systématique.'
[ [12] ] 'Hist. Nat. des Moll.,' vol. ii., pp. 358 to 368.
[ [13] ] Leisure Hour, October, 1875, p. 636.
[ [14] ] 'Voyage aux Iles Malouines.'
[ [15] ] 'Voyage de Découvertes aux Terres Australes.'
[ [16] ] 'Voyage de l'Uranie: Zoologie,' vol. i., part 2, p. 411. 1824.
[ [17] ] 'Manuel des Mollusques,' p. 86.
[ [18] ] 'British Conchology,' vol. v., p. 124.
[ [19] ] In the accompanying illustration, the size of the squid is exaggerated, but not so much as has been supposed.
[ [20] ] 'Sitzungsberichte der Gesellschaft naturforschender Freunde zu Berlin,' pp. 65-67, quoted by Professor Owen, op. cit.