For want of space it must here suffice simply to name some of the ornithologists who have elaborated, to an extent elsewhere unknown, the science as regards their own country: Altum, Baldamus, Bechstein, Blasius (father and two sons), Bolle, Borggreve, whose Vogel-Fauna von Norddeutschland (8vo, 1869) contains what is practically a bibliographical index to the subject, Brehm (father and sons), Von Droste, Gatke, Gloger, Hintz, Alexander and Eugen von Homeyer, Ji ckel, Koch, KOnig-Warthausen, Kriiper, Kutter, Landbeck, Landois, Leisler, Von Maltzan, Bernard Meyer, Von der Miihle, Neumann, Tobias, Johann Wolf and Zander.
There is no evidence, so far as we can see, of his having been aware of Merrem's views; but like that anatomist he without hesitation divided the class into, two great " coupes," to which he gave, however, no other names than " Oiseaux normaux " and" Oiseaux anomaux "-exactly corresponding with his predecessor's Carinatae and Ratitae-and, moreover, he had a great advantage in founding these groups, since he had discovered, apparently from his own investigations, that the mode of ossification in each was distinct; for hitherto the statement of there being five centres of ossification in every bird's sternum seems to have been accepted as a general truth, without contradiction, whereas in the ostrich and the rhea, at any rate, L'Herminier found that there were but two such primitive points, 3 and from analogy 1 Their value was, however, understood by Gloger, who in 1834, as will presently be seen, expressed his regret at not being able to use them.
Gloger brought out at Breslau the first (and unfortunately the only) part of a Vollstandiges Handbuch der Natur- In th e Introduction to r t his?
Notwithstanding this, to Gloger seems to belong the credit of being the first author to avail himself in a book intended for practical ornithologists of the new light that had already been shed on Systematic Ornithology; and accordingly we have the second order of his arrangement, the A y es Passerinae, divided into two suborders: singing passerines (melodusae), and passerines without an apparatus of song-muscles (anomalae) - the latter including what some later writers called Picariae.
Like Gloger, Sundevall in his ideal system separated the true passerines from all other birds, calling them Volucres; but he took a step further, for he assigned to them the highest rank, wherein nearly every recent authority agrees with him; out of them, however, he chose the thrushes and warblers to stand first as his ideal " Centrum " - a selection which, though in the opinion of the present writer erroneous, is still largely followed.