SOME MIOCENE SCUTELLINA (ECHINOIDEA, ECHINODERMATA) FROM THE NORTHERN PART OF THE WESTERN DESERT, EGYPT COMPARISON BETWEEN ECHINOMETRA SPECIES FROM MAURITIUS AND OKINAWA PALEOZOIC-TYPE ECHINODERM POPULATIONS FROM THE LATE EOCENE, ANTARCTICA ORIGIN OF THE CLASS CRINOIDEA SETTLEMENT AND RECRUITMENT OF ECHINODERMS IN KELP BEDS AND SEA URCHIN-DOMINATED BARREN GROUNDS IN NOVA SCOTIA VARIATION IN ...