Carpenter, William Benjamin, 1813-1885 · London : John Churchill · leaf 620
hat they are pro-gressively enlargedby the deposition ofnew laminse, each of which is in contact with the internalsurface of the preceding, and extends beyond it,—doesnot express the whole truth; for it takes no account ofthe fact that most shells are composed of two layers ofvery different… … Tubular Shell-structure of Anomia. FiGr. 253.
Microscopy
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