Carnegie Institution of Washington Publication
Carnegie Institution of Washington Publication
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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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To quickly assess the difficulty of the text, read a short excerpt:
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.
What to read after Carnegie Institution of Washington Publication?
You can find similar books in the "Read Also" column, or choose other free books by Carnegie Institution of Washington to read onlineMoreLess
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