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Although there are eight or more species of Ammonites and six of them peculiar to it, this genus is much less fully represented than in each of the other subdivisions of the Upper Cretaceous group. Terebratulina striata, Wahlenb. Rhynchonella octoplicata, Sowerby. Upper white chalk. Magas pumila, Sowerby. Terebratula carnea, Sowerby. Terebratula biplicata, Brocch. Crania Parisiensis, Duf.
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