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Olicancilleria Braziliensis d'Orbigny. 4. Olicancilleria auricularia, d'Orbigny. 5. Olivina puelchana, d'Orbigny. 6. Buccinanops cochlidium, d'Orbigny. 7. Buccinanops globulosum, d'Orbigny. 8. Colombella sertulariarum, d'Orbigny. 9. Trochus Patagonicus, and var. of ditto, d'Orbigny. 10. Paludestrina Australis, d'Orbigny. 11. Fissurella Patagonica, d'Orbigny. 12. Crepidula muricata, Lam. 13.
Sir W. Parish has given me some of these shells, and M. d'Orbigny pronounces them to be: Buccinanops globulosum, d'Orbigny. Olivancillaria auricularia, d'Orbigny. Venus flexuosa, Lam. Mactra Isabellei, d'Orbigny. Ostrea pulchella, d'Orbigny. Voluta colocynthis. Voluta angulata. These shell-beds extend from one league to six leagues from the Plata, and must lie many feet above its level.
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