186 GLOSSARY. 



Sinistral (p. 95). In shells turning from east to 

 north. 



Spherules (p. 29). Bodies of globular form. 



Styles (p. 100). Stiff unjointed processes, tapering 

 to a point. 



Sub- (p. 32, &c.). Almost or somewhat. 



Suture (p. 27). A mark or seam, where two edges 

 have united. 



Tentacles (p. 15, &c.). Slender, contractile, unjointed 

 organs, placed near the mouth. 



Tentacular (p. 100). Resembling tentacles. 



Terminal (p. 19). Placed at the extremity. 



Tissues (p. 17). The soft substances which make 

 up a living body. 



Transverse (p. 67). Placed across, from right to left. 



Truncate (p. 26). Terminating abruptly, as if the 

 tip had been cut off. 



Umbilical (p. 12). Next to the umbilicus, or the 

 depression in the centre of a shell, around which its 

 spire winds. 



Vesicle (p. 18). A small bladder or bag. 



Vibratile (p. 76). Capable of rapid motion to and fro. 



Viscera (p. 76). Internal soft organs, necessary to 

 the maintenance of life. 



