USED IN NATURAL HISTORY. 



135 



SETA'CEO-ROSTRATE. Having a beak 

 with the figure of a bristle. 



SETI'FKROUS. Bearing bristles. 



SETIFORM. Formed like a bristle. 



SETI'GKROUS. Having or bearing 

 seUe. 



SETOSE. Bristly; covered with bris- 

 tles. 



SETO'SUS. Lat. Bristly. 



SHAFT. A cylindrical hollow space, 

 or pit, in mines, made for the pur- 

 pose of extracting ores, &e. 



SHALE. An indurated slaty clay, or 

 clay-slate. 



SHEATH. In botany, the lower part 

 of a leaf that surrounds the stem. 



SHINGLE. Loose, water-worn gravel 

 and pebbles on the sea-shore. 



SHOOTS. Slips. Branches from 



which gardeners cause adventi- 

 tious roots to grow, and which 

 they afterwards separate from 

 the parent plant, (p. 63, Book vii). 



SHRUB. A plant with a woody 

 stem, which branches out nearer 

 the ground than a tree, and is 

 usually smaller. 



SIER'RA. Sp. A mountain chain. 



SIGARE'TCS. A genus of gastero- 

 pods. 



SIGILLA'RIA. fr. lat. sigillum, a seal. 

 Fossil plants found in the coal 

 formation. 



SI'LEX. fr. gr. chalis, a pebble. The 

 principal constituent of quartz, 

 rock-crystal, flint, and other silice- 

 ous minerals. 



SI'LICA. Siliceous earth ; the oxide 

 of silicon (the elemt ? ntary basis of 

 silica), constituting almost the 

 whole of silex or flint. It com- 

 bines with many of the metallic 

 oxides, and is hence sometimes 

 called silicic acid. 



SI'LICATE. A compound of silicic 

 acid and a base; silicate of iron 

 is a compound of silicic acid and 

 oxide of iron ; plate-glass and win- 

 dow-glass are silicates of soda and 

 potassa, and flint-glass is a similar 

 compound with a large addition 

 of silicate of lead. 



SILICATED. In botany, coated or 

 mixed with flint. 



SILI'CEOUS. Containing silica: flinty. 



SILI'CIFIKD. Petrified or mineral- 

 ized by siliceous earth. 



SILI'CCLA. ) Dimin. of siliqua. A 



SILICCLO'SA. silicle. The small 

 round pod of cruciferae. 



SI'LIQ.UA. Lat. A pod. 



SILIQ.UE. The long taper pod of 

 cruciferae. 



SILIQ.UA'RIA. fr. lat. siliqua, a pod. 

 A genus of gasteropoda tubuli- 

 braiK-hiata. 



Sri.iQ.uosK. Having siliques. 



SILT. The name given to the sand, 

 clay, and earth which accumulate 

 in running waters. 



SILU'RI. Lat. plur. of silurus. 



SILU'RIAN STSTEM.-A series of rocks 

 formerly known as the greywacke 

 series. So called after the Silures 

 or Siluri, the ancient Britons who 

 inhabited the region where these 

 strana are most distinctly deve- 

 loped. They are entirely of ma- 

 rine origin. 



SILURUIUES. fr. gr. tiloitrns, name 

 of a particular fish ; vidot, resem- 

 blance. Systematic name of a 

 family of fishes. 



SILU'RUS. Lat. Name of a fish. 



SILVA. A forest or woods. 



SI'MIA. Lat. A monkey. 



SIMPLE. In botany, not divided, 

 branched, or compounded. 



SIMPLE MINERAL. A term applied 

 to individual mineral substances, 

 as distinguished from rocks, which 

 are aggregates of minerals. 



SINA'PIS. Lat. Mustard. 



SINE'NSIS. Lat. Chinese; belong- 

 ing or relating to China 



SI'NISTER. The left. 



SINTER. Ger. A scale. Calcare- 

 ous sinter is a variety of carbonate 

 of lime composed of successive 

 concentric layers. Siliceous sinter 

 is a variety of common opal. 



SINUA'TA.- Lat. Hollow, excavated. 



SI'NUATE. > fr. lat. sinus, a bay or 



SI'XUOSE. CAvily. Having a wvy 



