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Show 594 MR. F. E. BEDDARD ON THE [Dec. 3, this group of Hornbills may be regarded as a distinct generic type- Bycanistes. I am also inclined to think that Toccus is a distinct genus ; it may be that the African forms are really distinct from the Asiatic ; but this is a matter that requires further study. Col. Tickell1 has separated Aceros and those Hornbills such as Toccus which are without casques from the other Indian Hornbills, and has remarked that the two genera, which he terms Aceros and Buceros respectively, have a different mode of flight. Aceros, however, in m y opinion should not be generically separated from Buceros, the anatomical differences between the two genera being so extremely slight. Ceratogymna and Sphagolobus have a syrinx which differs in the non-fusion of the last tracheal rings from the syrinx of Buceros and particularly of Aceros, where the fusion between these rings is greater than I have observed in any other Hornbill. But this peculiarity, as also in the case of Toccus and Bycanistes, is correlated perhaps with the small size of the birds. 2. On the Anatomy of Burmeister's Cariama (Chunga burmeisteri). B y F R A N K E. B E D D A R D , M.A., F.R.S.E., Prosector to the Society. [Eeceived October 31, 1889.] Lntroductory. The specimen which forms the subject of the present paper was acquired by the Society in 1887 and died in 1888, being the fifth example2 which the Society has obtained. The bird itself was discovered only thirty years ago (in 1859) by Dr. Burmeister, and was first described by Dr. Hartlaub3 in the * Proceedings' of this Society. This description is confined to the external characters, and to an interesting account, from Dr. Bur-meister's notes, of the habits of the bird. It is considered by Hartlaub to present differences of subgeneric value from Cariama cristata. Reichenbach afterwards4 placed it in a separate genus, a proceeding which is approved of by Mr. Sclater5. A figure of the bird6 illustrates Mr. Sclater's note which has just been referred to. Later Dr. Burmeister7 gave a somewhat fuller account of its external characters, agreeing with Reichenbach in distinguishing it generically. Dr. Gadow has given8 some account of the visceral anatomy of 1 Birds of India (MS.); this work is in the Society's Library. 2 Sclater, P. Z. S. 1887, p. 319. 3 " On a new form of Grallatorial Bird nearly allied to the Cariama (Bicho-lopkus cristatus)," P. Z. S. 1860, pp. 335-6. 4 Die vollstandigste Naturgeschichte der Tauben, etc. p. 159. 6 P. Z. S. 1870, p. 666. 6 Loc. cit. pi. xxxvi. 7 Eeise durch die La Plata-Staaten, Bd. ii. p. 506. B Journ. f. Ornith. Jabrg. xxiv. (1876) pp. 445-6. |