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Quart. Journ. Geol. Soc. vol. ix. Table to face p. 244.] Middle Rhine Boulonii^Sandberger). Limestone. 2 .{: Coal- measures. 0:::: Zones characterized Terebratula elongata. Higher r 1. . . Mountain < 2. . . Limestone. L 3. . . Produetus giganteus. Lower f Great . . . . „ . . . . Mountain ShaleP'iomyen-scliiefer . . Posidonia Becheri ; Goniatites cremstna. Limestone. LDoIoiI Yellow Sandstone Group. Ferques and Fiennes Group. rShale fl- J Yelloi)j.idinen-scliiefer</ ^.Cypndina serratostriata, Sandb. S j^e,j g ^ Calymene granulata ; Goniatites bifrons. 1 Fossil L3. Cucullaea Haidingeri ; C. trapezium. fCoral'^^lstein Sphseronites tessellatus. Shale[Qjjjj^g Cyrtoceras, pi. sp. I^oloi Stringocephalus Burtini ; Brontes flabel- Shale: lifer. I Sl^c^estone of Villmar. . Calceola sandalina. |_ Shale fSand! Red I Blaci •{ Lime' of Wissenbach. . . . Pleurodictyon problematicum. r sandstone series, . Spirifer macropterus.
