. The testimony of the rocks; . SIGILLARIA GEOESEBI (Coal Measures.) leaves, similar to those into which the Roman architectsfretted the torus of the Corinthian order. The Sigillaria 256 GEOLOGY IN ITS BEARINGS were fluted columns ornately carved in the line of 1J ^channelled flutes; the Lepidodendra bore, according totheir ispecies, sculptured scales, or lozenges, or egg-likehollows, set in a sort of frame, and relieved into knobs andfarrows; all of them furnishing examples of a delicatediaper work, like that so admired in our more ornateGothic bmldings, such as Westminster Abbey, or Canter-.


. The testimony of the rocks; . SIGILLARIA GEOESEBI (Coal Measures.) leaves, similar to those into which the Roman architectsfretted the torus of the Corinthian order. The Sigillaria 256 GEOLOGY IN ITS BEARINGS were fluted columns ornately carved in the line of 1J ^channelled flutes; the Lepidodendra bore, according totheir ispecies, sculptured scales, or lozenges, or egg-likehollows, set in a sort of frame, and relieved into knobs andfarrows; all of them furnishing examples of a delicatediaper work, like that so admired in our more ornateGothic bmldings, such as Westminster Abbey, or Canter-. WHOELED SHELLS OP THE OLD RED SANDSTONE.* bury and Chichester Cathedrals, only greatly more ex-quisite in their design and finish The scroll shells, a very. * Fi^. 102, Clymenia Sedwicki; Fig. 103, Gyroceras Eifelensis; Fig. 101,Ciirus Goldfussii. ox THE Tvro theologies. 257 numerous scctiou of the class in the earlier ages, such asMaclurea, Euomi^halus, Clymenia, and the great family ofthe ammonites, were volutes of varying proportions, butnot less graceful than the ornament of similar proportionsso frequently introduced into Greek and Roman architec-ture, and of which we have such prominent examples inthe capitals of the Ionic, Corinthian, and composite what is known as the modern Ionic the spiral of thevolute is not all on one plane; it is a Euomphalus: in thecentral volutes of the Corinthian the spiral is an open one;it is a Lituite or Gyroceras: in the ancient Ionic it is eitherwholly flat, as in Planorbus or the upper side of Maclurea,or slightly relieved, as in the am


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