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DIVISION VI. Shell with an internal appendage at the summit. 



Scientific name. Locality. Scientific name. Locality. 



Equestris, E. & W. Ind., Amboyna. Sinensis, Britain, Med., Batavia. 



Neptuni, So. Seas, St. Domingo. Auriculata, Batavia, W. In., Borneo. 



Tectum, Batavia, China. Duplicata. 



DIVISION VII. Shell ivith an internal, transverse partition. 



Trochiformis, Falkland Isl., Tranque. Fornicata, Medit., Goree. 



Trochoides, Aculeata, Maurit., W. Indies. 



Neritoida, Maurit., Indian Ocean. Goreensis, Goree, do. 



Porcellana, Goree, do. Crepidula, Mediterranean, Barbary. 



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