The pelecypod species Ostrea tecticosta, Trigonia cf. eufaulensis, Pecten (Camptonectes) kaufmanensis, Modiolus uddeni and Legumen ellipticum and the gastropod Turritella vertebroides are figured and recorded from central and southeastern Wyoming. Most of these are first records from the Rocky Mountain region. Many of these species seem to range into older strata in Wyoming than in the Gulf Coast. Occurrences of other southern species are mentioned.

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