The Spectacled Pelican, which is only found in southern climates, is thus named from the naked skin which surrounds the eye, reminding one of spectacles by its more or less circular form. Its plumage, like that of its congeners, is white. CHAPTER III. THE LARIDÆ. "Notwithstanding the dissimilarity of the bill," says Mr. Vigors (_Linn. Trans._, vol. xiv.), "the Sterna and Rhynchops most intimately accord in habits and external characters. The Gull-billed Tern of Colonel Montagu conducts us from these genera to the groups which compose the Linnæan genus _Larus_--now divided into two genera, _Lestris_ and _Larus_. From this group we are led to the genera _Diomedeæ_ and _Haladroma_, by the absence of the hind toe, by means of the species _Larus tridactylus_ (Latham), where, though the hind toe is not absolutely different, as might be inferred from its name, there appears but the rudiment of one. The last-mentioned genus, _Haladroma_, originally belonged to _Procellaria_, and was separated from it by its tridactyle foot. Even in this character, however, it forms a connection from _Larus_ to the groups that compose the genuine _Procellaria_, all of which are distinguished by the singular peculiarity of having no true hind toe, but only a nail adhering to the tarsus in its place. We thus arrive at the Petrels, separated into groups of the _Procellaria_ (Anet), _Pachyptila_ (Ilf.), _Puffucus_ (Ray)." THE LONGIPENNES (_Cuvier_). The _Grands Voiliers_, or Long-winged Birds, are thus named from their powerful and enduring faculty of flight. Mariners meet with them everywhere, and easily recognise them by their long and pointed wings, forked tails, and short legs. In this order the back toe is unconnected with the others, or is wanting, and the membrane which unites the others much notched; their bills are sharp and pointed, and without indentations. They pass their lives at a great distance from land, and do not approach the shore except for breeding purposes. To this sub-order belong the Sea Swallows (_Sterna_), Scissors-bills or Skimmers (_Rynchops_), the Sea Gulls (_Laridæ_), the Labbes (_Stercoraria_), the Petrels (_Procellaria_), Albatross (_Diomedea_). THE TERN (_Sterna hirundo_, Linn.). ENGLISH SYNONYMS.--Common Tern: Selby, McGillivray, Morris. Greater Tern: Montagu, Bewick, Pennant. Local names: Sea Swallow, Gull Teaser, Tarney, Tarrock, Kippock, Scraye. LATIN SYNONYMS.--_Sterna hirundo_: Pennant, Montagu, Bewick, Flemming, Selby, Jenyns, Gould, Yarrell, Latham. _Sterna major_: Brisson. _Hirundo marina_: Ray, Willoughby.