10 Capt. Drummond : List of the Birds observed possess such firmness that they can be cut through horizontally with a sharp knife and nevertheless remain in their position. The larger of them are frequently flattened, but I could not find a trace of membranes by which they might be retained so firmly in their position. Similar solid filaments are met with in the larger cells of the fruit-parenchyma of Ribes nigrum : in this case also the upper and lower side of the cell may be cut away with-out the filaments running through their centre being moved out of their position. II. — List of the Birds observed to winter in Macedonia; from Notes made by Capt. H. M. Drummond, 42nd R. H., during a two months' Shooting Excursion in the Interior during the winter of 1845-46. I am not aware if Macedonia has ever been fully explored by any naturalist with a view to its ornithology, but from the general appearance of the country, its rich and varied landscape, abound-ing in high mountains as well as extensive plains, in some parts richly cultivated, in others clothed with vast extents of forest in-tersected by numerous lakes, rivers and marshes, as also from its geographical position, being so directly in the line of migration of all those species which pass up the Archipelago, it becomes one of the most interesting fields to the ornithologist, and I have no doubt, were it visited also during the spring and summer months, it would be found to possess many rare and beautiful species, and some even new to the European fauna. Vultur cinereus. A few of these rare and magnificent birds were seen in the large wooded plains, generally perched on the naked limb of some dead tree, where they sit for hours, seeming to prefer per-fect solitude, never mixing with the other vultures ; they were never observed on the mountains, but probably regulate their movements according to the herds of cattle which at this season are all brought down to the low grounds. V.fulvus. Most numerous on the plains as well as the moun-tains. Cathartes percnopterns.\ A f ' , Gypaetm barbatus. ) A few scen on the ">° un <*«> s -} F. tinnunculus. J Falco peregrinus F. subbuteo. F.«I», ^Common. F. imperialis. Rare. F.fulvus. 1 Most numerous on the large wooded plains, fifteen F. albicilla. J or twenty being often observed in the air at once, and their nests may be seen in every direction, the largest trees being
II.—List of the birds observed to winter in Macedonia; from notes made by Capt. H. M. Drummond, 42nd R. H., during a two months' shooting excursion in the interior during the winter of 1845–46
BioStor
