Sentence Examples

  • Lingula pyramidata (after Morse).
  • In Lingula the shell is composed of alternate layers of chitin and of phosphate of lime.
  • In Terebratulina, Rhyn- chonella, Lingula, and possibly other genera, the arms can be unrolled and protruded from the opened shell; in this case the tentacles also FIG.
  • In Crania it is completely shut off from the main coelom, but in Lingula it communicates freely with this cavity.
  • In Discinisca and Lingula there is further a lip-sinus or hollow system of channels which traverses the supporting tissue of the edge of the mantle and contains muscle-fibres.