Elements of geology, or, The Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments elementsofgeolog00lyel Year: 1868 3M UPPER AND LOWER CRETACEOUS ROCKS. [Gh. XVIII. Avicula; also the remarkable shell Diceras Lonsdalii, eminently characteristic of the ferruginous beds of the Lower Greensand in Fig. 333. Geroillia aneeps, Lower Greensand. Fig. 334. Fig. 335. Trigonia eaudata, Agass. Lower Greensand. Terebratula sella, Sow. Lower Greensand. Wilts. This genus is closely allied to Chama, and the cast of the interior has been
Elements of geology, or, The Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments elementsofgeolog00lyel Year: 1868 3M UPPER AND LOWER CRETACEOUS ROCKS. [Gh. XVIII. Avicula; also the remarkable shell Diceras Lonsdalii, eminently characteristic of the ferruginous beds of the Lower Greensand in Fig. 333. Geroillia aneeps, Lower Greensand. Fig. 334. Fig. 335. Trigonia eaudata, Agass. Lower Greensand. Terebratula sella, Sow. Lower Greensand. Wilts. This genus is closely allied to Chama, and the cast of the interior has been compared to the horns of a goat. The same shell has been referred by some authors to Caprotina, and by others to Requienia. Fig. 336.
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