. A history of British fossil mammals, and birds . it belonged to aterrestrial genus of quadruped. The figures of two of its teeth, part of what theauthor intended, if he had lived, are so exact, and theprogress of Comparative Anatomy since 1668 has beenso immense, that they may now be determined, withoutmuch laudable ingenuity or blameable rashness, to have RIIINOCEKOS TICIIORHINUS. 829 belong-ed to a Rhinoceros, and to liave come from themiddle of the molar series of the upper jaw. But we arefortunately enabled to go further, and inquire into theexact species of Rhinoceros to which they belo
. A history of British fossil mammals, and birds . it belonged to aterrestrial genus of quadruped. The figures of two of its teeth, part of what theauthor intended, if he had lived, are so exact, and theprogress of Comparative Anatomy since 1668 has beenso immense, that they may now be determined, withoutmuch laudable ingenuity or blameable rashness, to have RIIINOCEKOS TICIIORHINUS. 829 belong-ed to a Rhinoceros, and to liave come from themiddle of the molar series of the upper jaw. But we arefortunately enabled to go further, and inquire into theexact species of Rhinoceros to which they belonged : forthe identical fossils discovered at Chartham are now pre-served in the British Museum. They are noticed byNehemiah Grew in his Catalogue of the Rarities ofGresham College, p. 254; and were doubtless transferredto their present depository along with the other objectscontained in the ancient Museum of the Royal Society. The annexed cut (fig. 122) is an original figure of thebest preserved of the molar teeth from Chartham : it is Fig. Upper molar tooth of JRMnoccros ticJwrhintis, Newer Pliocene, Clmrtham, Kent. the fifth or sixth molar of the right side. It well exem-plifies the close analogy of the molars of the Rhinocerosto those of the Pala^otherium (see fig. 110). We per-ceive the same cubical form of the crown ; the grinding 830 RHINOCEROS surface of which is similarly broken by a deep valley,(a,) extending from the posterior margin nearly half-wayacross, and by a deeper and longer valley, 5, commencingfrom the middle of the inner side of the crown, andexpanding and partly dividing into two deep depressionsnear its opposite extremity. The principal difference bywhich the upper molars of the Rhinoceros may be dis-tinguished, independently of their greater size, from thoseof the Palseotherium, is the much inferior depth of thetwo longitudinal depressions {d d) on the outer side ofthe tooth, and the feeble development of their boundaryridges. In the Palaotherium,
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Keywords: ., bookaut, bookcentury1800, bookdecade1840, booksubjectpaleontology
