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Show 602 MR. R. B. SHARPE ON THE BIRDS OF CAMEROONS. [June 20, of a snag from the front of the base of the horns, which is three-lobed at the end, two smaller lobes being directed forward and much below the erect tip. The right horn resembles that of a much developed, but rather irregularly divided form of those of a Roebuck, with very thick and very deep longitudinal grooves, having high ridges, nodulous on the edges, occupying the whole length of the main beam to the burr, just above which they are largest and deepest; and it has on the inner side of the first furcation a thick, short, recurved snag. The left horn is like the other, but much thicker at the base; the recurved snag on the inner side is much longer and more slender ; but the usual anterior snag of this furcation is reduced to a very small conical prominence; and what seems to be equivalent to the hinder lower snag of the other horn is a dilated flattened process at the base, divided into two slender, unequal lobes at the top. But the great peculiarity of this horn is the existence of a branch springing from the front of the base of the main beam, about half as large as the horn itself, and having two conical divergent snags on the front part of the middle of its length. Daubenton, in Buffon's « Nat. Hist.' vol. vi. p. 241, t. 36. f.2, 3,4, figures three malformations of the horns of the Roebuck, but does not represent any like the one described from the specimen in the British Museum. 10. O n the Birds of Cameroons, Western Africa. By R. B. S H A R P E , F.L.S. & c , Librarian to the Society. [Received June 6, 1871.] (Plate XLVII.) After having quitted the field of his former labours in Madagascar, Mr. Crossley undertook an expedition to Cameroons, at the instance of Mr. Ward, of Halifax, to whom ornithologists are greatly indebted for having sent out such an indefatigable collector to so interesting a locality. As in the case of all his former collections, the specimens are admirably preserved by Mr. Crossley, who in this respect does great credit to Mr. Cutter, his agent, who trained him in preparing specimens of natural history. The avifauna of Cameroons always possessed great attractions for me, inasmuch as I was anxious to obtain some idea of the birds of this part of Africa, believing that, from the mountainous nature of the country, some modification in the aspect of the ornithology of Gaboon and Fantee, which so closely assimilate to each other, might be expected. The result, however, proves that in its general features the avifauna of Cameroons is precisely similar to that of the two last-named countries. The proving of this fact is of great interest, as previously we were totally unacquainted with the birds |