Chapter 40 Key Terms

• p. 860: lopophore
  
• p. 861: zoecium (plural, zoecia)
  
• p. 862: visceral mass, mantle, gills
  
• p. 863: bivalve molluscs, pelagic, radula (plural, radulae)
  
• p. 864: nephridia (singular, nephridium), nephrostome, trochophores, veliger
  
• p. 865: operculum (plural opercula), torsion
  
• p. 866: adductor muscle
  
• p. 867: palps
  
• p. 868: spermatophore, oviduct, septa (singular, septum)
  
• p. 870: setae (singular, seta), clitellum (plural, clitella)
  
• p. 871: commensal, parapodia (singular, parapodium), gonads