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Show 1875.] MR. A. H. GARROD ON HALMATURUS LUCTUOSUS. 49 Mr. Waterhouse bases his description of this last-named species on a skin so labelled in the British Museum, and on Muller's account of the same animal in his elaborate work*, in the letterpress of which it is termed Dorcopsis brunii. The priority of the generic name being undisputed, any fresh species which can be shown to be generically related to the above-determined species is evidently a species of the genus Dorcopsis. This last remark is called for because the subject is rendered somewhat involved by an oversight of the illustrious Miiller. In his description of his Dorcopsis brunii he evidently has no doubt that the specimen or specimens he is considering, is or are identical with the " Philander" described by Bruyn f as having been seen by him in the garden of the Governor of Batavia, upon which the name brunii was originally based. Prof. Schlegel"]:, however, has most convincingly shown the unjustifiableness of this assumption, and has proved beyond a doubt that the species to which the name Philander can alone be applied is that found only in the islands of Aru and the Ke group, whilst the species which forms the subject of Muller's memoir is a denizen of New Guinea itself. Prof. Schlegel therefore retains the name Macropus brunii for the Philander of Aru, and of the New-Guinea animal forms the new species Macropus muelleri. As to me it is evident that M. muelleri is generically distinct from Macropus in its widest sense, and from all its minor divisions, it is also evident that Dorcopsis muelleri must be the name applied to the Dorcopsis brunii of Miiller. The species which forms the subject of the present communication, belonging (as I hope to prove) to the same genus as Dorcopsis muelleri (Schlegel), must therefore stand as Dorcopsis luctuosa (D'Albertis). The material at m y disposal is the following:-the skin and skeleton of the type specimen of Dorcopsis luctuosa; the skins of an adult male and female, as well as of a young male, of Dorcopsis muelleri in the British Museum, collected by Mr. Wallace; a skull from the skin of the above-mentioned female of Dorcopsis muelleri ; the much-discoloured skin of the male of the same species in the British Museum, from New Guinea, described by Mr. Waterhouse§ as Macropus brunii; two skeletons of Dendrolagus inustus, one in the British Museum and the other in the Museum of the College of Surgeons ; as well as a pair of skins and an imperfect skull of Macropus brunii from Aru, kindly lent me by Mr. Edward Gerrard. So far as I know, the visceral anatomy of Dorcopsis muelleri has not been described. That of Dendrolagus inustus is fully given by Prof. Owen in the 'Proceedings' of this Society ||; and some of the actual specimens on which this description is based are preserved in the Museum of the College of Surgeons. The internal anatomy of Macropus brunii is not known. * Zoogdieren van den Indischen Archipel. pt. 4, pl. xxi. t Eeizen over Moskovie, p. 374, pl. 213 (1713). % Nederlandsch Tijdscbriffc voor de Dierkunde, 1866, p. 350 et seq. § ' Mammalia," vol. i. p. 180. || P. Z. S. 1852, p. 103 et seq. PROC. ZOOL. Soc-1875, No. IV. 4 |