Contributions to the Tertiary Fauna of Florida With Especial Reference to the M
Contributions to the Tertiary Fauna of Florida With Especial Reference to the M
William Healey Dall
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, 1862; Otia, Conch. , p. 241, 1862. Type. /, exquisita Gould, /. C. Prasina Deshayes, Cat. Moll. Isle de Reunion, p. 25, 1863. Type /'. Borbonica Desh. , op. Cit. , p. 29, pi. Iv. , figs. 4-8. Prasinia Cossmann, Cat. 111. Eoc. Paris, p. 174, 1887. Fischer (Man. , p. 950) separates Prasina from Julia on the ground that the latter is nacreous and has the borders finely crenulated, but both these FREE INSTITUTE OF SCIENCE TERTIARY FAUNA OF FLORIDA characters are non-existent in the one as much as... in the other. Gould prob- ably used the word " margaritacea" to express the lustre often seen on polished porcellanous shells, and the " crenulations" are merely the faint incremental radiations common to all bivalves. The examination of authentic specimens of Gould's species (for which I am indebted to the authorities of Cornell University) enables me to make a positive statement in regard to these facts. The shell is not pearly and the margin is not crenulated in the strict sense of those words.
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