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Show 1879.] MR. W. OTTLEY ON THE GROUND-HORNBILL. 461 (5) FURNARIUS TRICOLOR, During; Cab. J. f. O. 1878, p. 196. This little species, which is quite new to me, is even rather smaller than F. minor, Pelzeln, and quite different in colour. (6) SYNALLAXIS ORBIGNII (Reichenb.); Scl. P. Z. S. 1874, p. 22. Dr. Doring's skin is marked " S. fugax, sp. nov.," but agrees well with one in my collection (ex Mendoza, S. crassirostris, Land-beck) which I refer to S. orbignii (Reichenb.). (7) SYNALLAXIS SCLATERI, Doring; Cab. J. f. 0. 1878, p. 196. This species, which Dr. Doring has done me the honour to call after me, is certainly very nearly allied to my S. hudsoni (P. Z. S. 1874, p. 25), and may be the same. Unfortunately I have mislaid the typical specimen of S. hudsoni, and cannot make tbe necessary comparison. There is a faint tinge of yellow on the throat of S. sclateri; this was certainly well marked in my S. hudsoni. (8) PHACELLODOMUS SIBILATRIX, Doring, MS. I have already a Bolivian example of this species in my collection, but had confounded it with P. frontalis, as likewise Lafresnaye and D'Orbigny seem to have done. It appears distinguishable from P. frontalis by the rufous colour on the bend of the wing. (9) NOTIIOPROCTA DOERINGI, Cab. J. f. Orn. 1878, p. 198. This species is closely allied to N. pentlandi (Gray), of Bolivia, and to N.punctulata (Gray), of Chili. Specimens of all three species are in the Paris Museum. The following papers were read : - 1. A Description of the Vessels of the Neck and Head Ground-Hornbill (Bucorvus abyssinicus). By W . OTTLEY, F.R.C.S., Demonstrator of Anatomy at Univ. Coll. Lond. [Received May 17, 1879.] In a paper read before this Society in 1876 (see P. Z. S. 60), Mr. Garrod drew attention to a peculiarity in the vessels of the neck of the Ground-Hornbill, and pointed out that the carotid arteries, instead of being found in their usual place in the middle of the neck and in the hypapophysial canal, were replaced by two vessels which accompanied the pneumogastric nerves as far as the head. This peculiarity had not been observed in any other bird, the nearest approach to it being found in some Parrots, where such a vessel is found on one side of the neck, while the carotid artery of the other has its normal position. Though at first inclined to suppose that these aberrant arteries were really carotids, Mr. Garrod felt some doubt on the point, |