Abstract
Gastropods that occur in theAnomalorthisbrachiopod zone in the Spring Inlet Member of the Table Point Formation and in theOrthidiellabrachiopod zone of the Shallow Bay Formation of the Cow Head Group are documented. Gastropods from western Newfoundland comprise part of the Toquima-Table Head fauna, and six of the seven genera described here are also found in Whiterockian strata of Nevada. Four species assigned toMonitorellaRohr, 1994,MacluritesLe Sueur, 1818, andMalayaspiraKobayashi, 1958, originally described by E. Billings in 1865 from Middle Ordovician (Whiterockian) strata of Newfoundland are revised. Five species ofHelicotomaSalter, 1859,MalayaspiraKobayashi, 1958;LytospiraKoken, 1896;RossospiraRohr, 1994; andPachystrophiaPerner, 1903, not previously reported from Newfoundland are also described. The probable opercula ofMonitorella crenulata(Billings, 1865), andMaclurites emmonsi(Billings, 1865), are also illustrated for the first time.
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