Ordovician chitinous hydroids from Peary Land, eastern North Greenland

Abstract

Three specimens of chitinous hydroids recovered from the Børglum River Formation (Middle-Late Ordovician) of central Peary Land, eastern North Greenland, are briefly described and illustrated by scanning e1ectron microscopy. In two specimens the entrance to the theca is greatly reduced by a well developed diaphragm which is absent in the third specimen.