Sentence Examples

  • Or divisions were based upon certain modifications of structure which, as we now see, affected assemblages of diverse affinity: thus both Blastoidea and Euechinoidea were divided into Regularia and Irregularia; the Holothuroidea into Pneumophora and Apneumona; and Crinoids were discussed under the heads "stalked" and "unstalked."
  • As for Holothuroidea, the fossil evidence allows us to say no more than that the class existed in early Carboniferous times, if not before.