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73). Under Paraster 5 fossil species (see Key, p. 75). Under Periaster only 1 fossil spedes, PeriasUr elongatus. Under Schisaster only 1 fossil spedes, Schisaster sdUa, Under Brissopsis 3 fossil spedes (sec Key, p. 81). Under Plagiobrissus only 1 fossil spedes, Plagiobrissus loveni. Digitized by Google 54 FOSSIL ECHINI OF THE WEST INDIES. Under Macropneustes 2 foesil specks (see Key, p. 84). Under Brissus 2 fossil spedes (see Key, p. 86). Under Eupatagus 7 fossil spedes (see Key, p. 88). Under ...Breynia only 1 fossil spedes, Breynia cubmsis, VtaoBj ECHINONEIDJB A. Agasaiz, i88i. Ediinone!d« A. Agftssls, 1881 - Bdiinonide Wright. 1855. Genus ECHINONEUS Leske, 1778. Type species. — Echinoneus cyclostomus Leske, 1778, Add. ad Klein, p. 109. There seem to be only 2 species recognizable among the fossil species of this genus in the West Indies. K^ to the West Indian Fossil Species of Echinoneus. Ambitus nearly drcular, the shorter diameter being over 90 per cent of the longer. £. orhicmUris Ambitus elliptical, the shorter diameter being less than 90 per cent and usually about 75 per cent of the longer E.
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