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II.—On the Punctation of the Shells of Terebratula
Published online by Cambridge University Press: 01 May 2009
Extract
In 1844 Carpenter [1] divided the fossils then known as Terebratula into two groups—a perforate group, having the test covered with minute pores, and an imperforate group (the Rhynchonellids). These perforations (see Plate III) correspond to tubular processes of the mantle.
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