OF CONCHOLOGY. 165 



Stillate, radicating like the spokes of 



a wheel. 

 Striated, scored, or covered with fine 



thread-like lines. 

 Sub, in composition, it means almost 



or approaching to, as sub-globose, 



somewhat globular. 

 Subrotund, nearly globular. 

 Subulate, somewhat awl-shaped, or 



tapering gradually to a point. 

 Sulcated, furrowed, marked with 



broad furrows or ridges, 

 Sulci, furrows or ridges. 

 Summit, the tip or apex. 

 Suture, the hollow line which sepa- 

 rates the wreaths. 

 T. 

 Taper, gradually tapering to a point. 

 Tentacular, the feelers of worms, 



which inhabit shells. 

 Tesselated, chequered like a chess 



board. 

 Testacea, the third order of worms, 



