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- W2099689949 abstract "In this paper are described and grouped the shells of the family Dentaliidae which have been obtained from the Cretaceous rocks of Great Britain. It includes all the forms I know of; but there may be in local museums and private collections specimens I have not seen. In the genus Dentalium I have included all the forms belonging to this family which are not fissured at the apex, and those which are not swollen or constricted at the aperture. The Cretaceous species here described, included in the genus Dentalium thus constituted, may for the present be arranged under two subdivisions. A. Dentalium proper, comprising the larger forms, all of which are striated. B.The smaller and smooth forms. In the first of these groups four species are described: two of these are new ; and two, D. decussatum and D. medium , which were given by Sowerby in the ‘Mineral Conchology,’ are redescribed, as it seemed to me that his descriptions are incomplete. My description of D. decussatum is based on more than 50 specimens in my collection ; and with it I have been able to incorporate D. Striatum and D. ellipticum of Sowerby, as they are not distinct species. The latter was regarded by D9Orbigny as a synonym of D. decussatum . The description of D. medium is based upon specimens in the British Museum, the Jermyn-Street Museum, and Mr. Meyer9s collection. Sowerby9s figured specimen is evidently an internal cast, in which," @default.
- W2099689949 created "2016-06-24" @default.
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- W2099689949 date "1878-02-01" @default.
- W2099689949 modified "2023-10-16" @default.
- W2099689949 title "On the Cretaceous Dentaliidæ" @default.
- W2099689949 doi "https://doi.org/10.1144/gsl.jgs.1878.034.01-04.06" @default.
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