. The testimony of the rocks; . a, CHAMFERED SCALES. (OsteolepiS.) b, IMBRICATED SCALES. (GlyptolepiS,) {Old Hed Sandstone.) the Megalichthys of the Coal Measures, were of consider-able mass and thickness. They could not, compatibly with flexure without risk of dislocation. The uppermost joint shows twolateral cavities for the articulation of auxiliary arms. OK THE TWO THEOLOGIES. 247 much nicety of finish, be laid over each other, like the thinhorny scales of the salmon or herring; and so we find themcuriously fitted together, not like slates on a modern roof,but like hewn stones on an ancien

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. The testimony of the rocks; . a, CHAMFERED SCALES. (OsteolepiS.) b, IMBRICATED SCALES. (GlyptolepiS,) {Old Hed Sandstone.) the Megalichthys of the Coal Measures, were of consider-able mass and thickness. They could not, compatibly with flexure without risk of dislocation. The uppermost joint shows twolateral cavities for the articulation of auxiliary arms. OK THE TWO THEOLOGIES. 247 much nicety of finish, be laid over each other, like the thinhorny scales of the salmon or herring; and so we find themcuriously fitted together, not like slates on a modern roof,but like hewn stones on an ancient one. There ran on theupper surface of each, along the anterior side and higherend, a groove of a depth equal to half the thickness of thescale; and along the posterior side and lower end, on theunder surface, a sort of bevelled chamfer, which, fitting intothe grooves of the scales immediately behind and beneath Fig. 99.

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