PLATE

GLYPTAGNOSTUS Whitehouse, 1936. Glyptagnostus s p., M. - U. Cambrian, Ourwoods Shale, Purley Quarry, Mancetter, Warwickshire (xl3.5). (Gift of R. J. Kennedy, RLS coll.)

4.2 Ordovician Families

AGNOSTIDAE M'Coy,

Agnostinae M'Coy, GERAGNOSTIDAE Howell,

MICRAGNOSTIDAE Howell,

PSEUDAGNOSTIDAE Whitehouse, SPHAERAGNOSTIDAE Kobayashi, PHALACROMIDAE Hawle and Corda, PTYCHOPARIIDAE Matthew,

Eulominae Kobayashi, CONOCORYPHIDAE Angelin,

SOLENOPLEURIDAE Angelin,

Hystricurinae Hupe,

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