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. 2^). 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. 



