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Examples of Undulatum
Prestwich, Mr., on age of Sables inferieurs.
Pratt, Mr., on Eocene Isle of Wight mammalia.
Shells of the genera Productus (Figure 414) and Strophalosia (the latter of allied form with hinge teeth), which do not occur in strata newer than the Permian, are abundant in the ordinary yellow magnesian limestone, as will be seen in the valuable memoirs of Messrs. King and Howse.
There are 25 Gasteropods and only one cephalopod, Nautilus Freieslebeni, which is also found in the German Zechstein. (FIGURE 416.
Trigonocarpum ovatum, and T. olivaeforme, Coal.
Triloculina inflata, Eocene. Trimmer, Mr., on contorted strata.