Sentence Examples


  • Amussiidae.-Shell orbicular, smooth externally with radiating costae internally.
  • Carditidae.-Shell thick, with radiating costae; foot carinated, often byssiferous.
  • Shell equivalve, with radiating costae and external ligament.
  • - Corallum of Caryophyllia; semi-diagrammatic. th, Theca; c, costae; sp, septa; p, palus; col, columella.
  • (5) The costae, longitudinal ribs or rows of spines on the outer surface of the theca.
 

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