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30.

In this paper the American species and varieties of Eupleura are reviewed, their synonymy given and new forms described and figured.
The fossil Nassa californiana and Cryptodon bisectus of Courad are recognized in the recent fauna; several species of Californian Fusus are discussed and F. Kobelti and Harfordi hitherto unfigured are illustrated. The adult Trophon triangulatus Cpr. is for the first time recognized and figured, also Carpenters' Clementia subdiaphana and Deshayes' Tellina denticulata. The following new species and varieties are described: Eupleura unisfinasa, E. limata, E. sulcidentata, Trophon cerrosensis, Cancellaria Crawfordiana, Tellina Idae, Terebratella occidentalis var. obsoleta, Buccinum strigillatum