. Narrative of the surveying voyage of Fly : commanded by Captain Blackwood, , in Torres Strait, New Guinea, and other islands of the Eastern Archipelago, during the year 1842-1846 ; together with an excursion into the interior of the eastern part of Java. been shed andwhen the sockets of the anterior molars have been obli-terated, shew the Halicore australis to have a smaller head,and most probably to be a smaller animal, than theHalicore indicus. The specific distinction is, however,more decidedly manifested by the difference in the dental APPENDIX. 327 formula, and by certai
. Narrative of the surveying voyage of Fly : commanded by Captain Blackwood, , in Torres Strait, New Guinea, and other islands of the Eastern Archipelago, during the year 1842-1846 ; together with an excursion into the interior of the eastern part of Java. been shed andwhen the sockets of the anterior molars have been obli-terated, shew the Halicore australis to have a smaller head,and most probably to be a smaller animal, than theHalicore indicus. The specific distinction is, however,more decidedly manifested by the difference in the dental APPENDIX. 327 formula, and by certain osteological characters, of whichthe following are the principal. The alveolar series of the two sides of the upper jaw,in the younger skull of Halicore australis (fig, 1), have agreater anterior convergence, and the outer boundary orcurve of the series is more convex than in Halicore indicus(fig. 2). The basi-occipital bone, and parietal bone, arebroader in proportion to their length in Halicore part of the deflected maxillary and intermaxillarybones, which is bounded posteriorly by a ridge, is longerin proportion to the breadth of the same part in Halicoreaustralis (fig. 3), than in Halicore indicus (fig. 4). Fig. 3.—Skull of Australian Fig. 4.—Skull of Indian Dugong, 328 APPENDIX. The deflected symphysis of the lower jaw is also longerin proportion to its antero-posterior extent in Halicoreaustralis (fig. 3). There are some minor differences in thecranium; but the general structure and configuration ofthis part of the skeleton is closely similar in both species. With regard to the rest of the skeleton, the scapula(fig. 5) best exemplifies the specific distinction of theHalicore australis.
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectnaturalhistory, booky
