^{page 92 note 1} Otto Keller (Antike Thierwelt, ii. p. 235) identifies the bird with the Sheldrake (Anas tadorna, L.), his argument being (like that of Dr. Warde Fowler) that the Sheldrake makes its nest in a burrow.

^{page 93 note 1} Hence the name of ‘Cahow-bird,’ applied to a species of Shearwater once immensely abundant, now extinct or nearly so, in the Bermudas.

^{page 94 note 1} Cf. (e.g.) Wilson, E. A. Report of National Antarctic Expedition, Aves, iv., p. 80, 1907.Google Scholar

^{page 94 note 2} Giglioli (Inchiesta ornit. in Italia; parte seconda, Avifauna Italica, p. 527) gives Artera as the vernacular name at present in Southern Italy (Puglio, Bari): may one not suspect here a misprint for Artena? Reichenbach, in his Systema Avium (1850–52, p. iv; cf. also his Synopsis Avium, pl. ix. figs. 768–770), mentions ‘Ardenna, Aldrovandi,’ as a name of the Shearwater.

^{page 95 note 1} Mergus, in Plin. x. 65 (47), is a Skua Gull: ‘inter aquaticas mergi soliti sunt devorare quae cetera reddunt.’ In Plin. x. 48 (33) it is a Cormorant: ‘mergi et in arboribus nidificant,’ etc.

^{page 96 note 1} No group of birds is more puzzling to the systematist than the Shearwaters, and ornithologists are not agreed as to the specific distinctions. P. kuhli is the representative in the Mediterranean of our great Shearwater; a large light-coloured bird. The small Shearwater of the Mediterranean, black upon the back, is usually distinguished as P. yelkouan; but Giglioli and others consider it identical with our Manx Shearwater.