. The testimony of the rocks; . ENCRINITES MONILIFORMIS. {Trias.) CUPRESSOCRINUS CRASSUS. {Old Bed Sandstone.) head with the most exquisitely constructed plate armor:but as their abdomens seem to have been soft and defence-less, they had the ability of coiling themselves round on theapproach of danger, plate moving on plate with the nicest 24-1 GEOLOGY IN ITS BEARINGS adjustment, till the rim of the armed tail rested on that ofthe armed head, and the creature presented the appearanceof a ball defended at every point. In some genera, as hiCalymene, the tail consisted of jointed segments tih its
. The testimony of the rocks; . ENCRINITES MONILIFORMIS. {Trias.) CUPRESSOCRINUS CRASSUS. {Old Bed Sandstone.) head with the most exquisitely constructed plate armor:but as their abdomens seem to have been soft and defence-less, they had the ability of coiling themselves round on theapproach of danger, plate moving on plate with the nicest 24-1 GEOLOGY IN ITS BEARINGS adjustment, till the rim of the armed tail rested on that ofthe armed head, and the creature presented the appearanceof a ball defended at every point. In some genera, as hiCalymene, the tail consisted of jointed segments tih its ter-mination ; in others, as in Illgenus, there was a great caudalshield, that in size and form corresponded to the shieldwhich covered the head; the segments of Calymene, fromthe flexibility of their joints, fitted close to the cerebralrim; while the same eflect was produced in the inflexibleshields, caudal and cephalic, of lUaenus, by their exact cor-respondence, and the flexibility of the connecting rings,which enabled them
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