Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 901
in fossil shells, thatFig. 636.—Membranous basis of the same. the decay of the animal membrane leaves the con-tained prisms without any connecting medium ; as they are thenquite isolated, they can be readily detached one from another ; andeach one may be observed to be marked by the like… … Fig. 635.—Section of shell of Pinna, takentransversely to the direction of its prism.
Microscopy
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