Sentence Examples with the word Blastoidea

All the complicated structures of Blastoidea are evolved from a fairly simple type, which in its turn is linked on to one of the cystid orders.

The Echinoderms may be divided into seven classes, whose probable relations are thus indicated: Cystidea Edrioasteroidea Pelmatozoa Holothurioidea Crinoidea Blastoidea Eleutherozoa Stelliformia Echinoidea Brief systematic accounts of these classes follow: Grade A.

These are the forms to which the name Blastoidea is usually restricted.

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Etheridge, jun., compiled the large Catalogue of Blastoidea in the British Museum, 1886; O.