MIDDLE CHALK—GENERAL ACCOUNT. 
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Fossils of the Middle Chalk. 
Fig. 56. —Ammonites [Acanthoceras] noclosoides, Schloth. | nat. size. 
Fig. 57. —Inoceramus mytiloides, Sow. Nat. size. 
Fig. 58.— Inoeeramus Cuvieri, Mant. Small specimen, nat. size. 
Fig. 59. —Terebratulina gracilis, var. lata, Eth. Three times nat. size. 
Fig. 60. —Terebratula semiglobosa, Sow. Nat. size. 
