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Keywords from Image Description:
FMIB Pennaria tiarella McCr AMedusa from which the ova has been expelled BMedusa expelling an ovum.jpeg Pennaria tiarella McCr Medusa from which the ova has been expelled Medusa expelling an ovum Subject Pennaria Hydroida Tag Invertebrates Cite book Hydroids of the Woods Hole Region Nutting Washington DC Government Printing Office