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Show 1891.] PLEISTOCENE B I R D - R E M A I N S . 473 however, rather smaller than one of T. torquatus belonging to in the British Museum. Moreover, it agrees with that specimen in the slight degree of development of the oblique ridge on the outer surface of the delto-pectoral crest, in which respect it differs from the humerus of Turdus proper. I am therefore inclined to refer the Fig. 2. 1 Dorsal and palmar aspects of the right humerus of Turdus, cf. merula, from Toga, Corsica. {. specimen to the Meruline group, and think it highly probable that it belongs to Turdus merula. Hirundinidce.-The humerus of the Swallows is characterized by its relative shortness, and the development of a narrow and very shallow tricipital fossa extending slightly beneath the head. The specimen of the left side, from Monte San Giovanni, represented in figs. 10, 10 a of the Plate, indicates a member of this family, and is not improbably referable to Hirundo rustica. It is slightly narrower than the recent humerus of Chelidon urbica figured by Milne-Edwards in his ' Rech. Oiseaux Foss. de la France,' pi. 149. fig. 4, and still narrower than the fossil one of Cotile rupestris represented in plate 156. fig. 24 of the same work. V. COLUMBJE. Columba, cf. livia, Linn.-The only specimen in the Sardinian collection which can be referred to the Columbidce is the coracoid from Tavolara represented in fig. 11 of the Plate. This specimen has lost the subclavicular process as well as the extremity of the hyo-sternal angle. It agrees so closely with the coracoid of Columba livia that I am disposed to refer it to that species, now common on both sides of the Mediterranean. Among the specimens from the breccia of Toga, Corsica, is the right humerus of a Pigeon which may probably be referred to the same species as the Sardinian coracoid. The length of the specimen (fig. 3, p. 474) is 0,044; and it agrees very closely with the corresponding bone of a rather larger skeleton of C. livia in the British Museum. |