222 GLOSSARY. 



Produced (p. 100). Drawn out. 



Quincunx (p. 12). The arrangement of the knots 

 in a net. 



Serrated (p. 156). Notched like a saw. 



Striated (p. 59). Marked with fine indented lines. 



Thorax (p. 32). The part of the body answering to 

 the chest. 



Umbilicus (p. 118). The hollow axis of some Gas- 

 tropod shells, around which the spire is wound. 



Note. For other technical terms refer to the Glossary in 

 Part I. 



