920 GLOSSARY. 



Quadrumana (four -handed) ; the monkey tribes. 



Qua-qua-versal applied to concentric strata, that dip on every side. 



Quartz a mineral composed of pure flint. 



Quartzose rocks composed of silex, or flint. 



Radiata the lowest primary division of the animal kingdom : as, the 



Echinoderms, Polyparia, &c. 



Ramose branched. 



Reniform kidney-shaped. 



Reticulated resembling net-work. 



Rodentia (gnawers); an order of animals having teeth of a peculiar 



structure, by which they can drill holes, as the Rat, 



Squirrel, &c. 



Rubble fragmentary beds of stone. 



Ruminantia animals that chew the cud, as the Deer, Ox, &c. 



Saurians reptiles of the lizard order. 



Scaphite extinct genus of cephalopoda, of a boat-like form. 



ScoRiaa volcanic cinders. 



Sedimentary deposited as a sediment by water. 



Segregation a chemical separation of mineral substances. 



Septa partitions, as in the shells of the Nautili. 



Septaria nodules of clay, having crevices filled with spar. 



Serrated toothed like a saw. 



Sertularia a genus of arborescent corals. 



Shale, or Schist slaty clay. 



Silex flint. 



Silicon the base of flint. 



Siliceous flinty. 



Silicified changed into flint. 



Silt fluviatile mud. 



Sinter a precipitate from mineral springs. 



Spatangus a genus of sea-urchins. 



Spathose opaque. 



Spheroidal oblate, or having the form of a spheroid. 



Spicula sharp-pointed processes. 



SauAMOus arranged like scales. 



Stalactite pendent masses of carbonate of lime. 



Stalagmite calcareous concretions formed on the floor of caves by 



droppings from the roof. 



Stellular having star-like forms. 



Sternal relating to the sternum or chest. 



Sternum the breast-bone. 



Stratified deposited in layers. 



Stratum a layer of any deposit. 



Strike the direction or line of bearing of strata, which is always a 



right, angles with the dip. 



Stufas volcanic vents emitting gases and vapours. 



Syenite, orSiENiTE . a species of granite in which hornblende supplies the place 



of mica. 



Tentacula feelers. 



Tertiary ancient formations, but newer than the chalk. 



Testacea shells. 



Thermal hot. 



Thoracic belonging to the chest or thorax. 



Trachyte lava chiefly composed of felspar. 



Trap rocks ancient volcanic rocks; the term derived from the Swedish , 



trctppa, a stair. 



Travertine crystalline tufaceous limestone. 



Tricuspid having three points. 



Tridactyle three-fingered. 



Trilobate thrce-lobed. 



