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Show 1879.] PROF. GARROD ON THE ANATOMY OF THE HOATZIN. 109 took place in these birds. Again, the bird does not seem to be a young one. "The Mitua in question, was presented by a patron of our garden, and is there named ' Mitua brasiliensis.' " Mr. Sclater stated that the bird in question, having recently died, had been presented to the Zoological Museum of Copenhagen, and that Prof. Reinhardt had forwarded it to him for examination. Mr. Sclater then proceeded to remark on the specimen, and stated that he quite agreed with Prof. Reinhardt that it must be considered as the representative of a new and distinct species, which Prof. Reinhardt had proposed to call Mitua salvini1. Prof. Reinhardt had ascertained the sex by dissection to he female ; but the male would probably scarcely differ. The dimensions were nearly those of M. tomentosa ; and the species should stand next to that species in Mr. Sclater's arrangement (Trans. Zool. Soc. vol. ix. p. 284), with the following differential characters :- Nigra purpurea nit ens; ventre imo et caudee apice albis; pilei plumis elongatis, sicut in M . tuherosa jacentibus ; loris et capitis lateribus dense plumosis ; rostro sicut in M . tomentosa formato sed paulo longiore et minus alto, toto rubro; pedibus rubris : long, tota circ. 2*10, alee 15, caudee 12*5, tarsi 4*7- Obs. Sp. ventre albo satis distincta, quoad rostrum ad M. tomen-tosam, sed quoad cristam magis ad M. tuberosam appropinquans. Mr. R. Bowdler Sharpe exhibited a series of Bulwer's Pheasants (Lobiophasis bulweri) from the Lawas river, N.W. Borneo, collected by Mr. W . H. Treacher, Acting Governor of Labuan. The series represented every stage of plumage of this Pheasant, and conclusively proved that L. castaneicaudatus, Sharpe, was the immature male of L. bulweri. The following papers were read :- 1. Notes on Points in the Anatomy of the Hoatzin (Opisthocomus cristatus). B y A. H. G A R R O D , M.A., F.R.S., Prosector to the Society. [Eeceived December 9, 1878.] Prof. Newton having most kindly placed in my hands for dissection three specimens of Opisthocomus cristatus preserved in spirit, 1 am able to add a few details to the accounts which have already appeared on the structure of this peculiar bird. In his valuable paper in this Society's 'Proceedings'2, " O n the Classification and Distribution of the Alectoromorphae and Hetero- 1 Cf. Vid. Medd. Nat. For. i Kjobenhavn, Jan. 8, 1879. 2 P. Z. S. 1868, p. 294. |