Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 758
rer; and it may be * For an explanation of the real nature of what was formerly described bythe Author as tubular Shell-substance, see § 810. GROWTH OF BIVALVE-SHELLS :—BEACHIOPODS. 673 easily shown by tracing- them towards the hinge on the one sideand towards the margin on the other, that at every… … Vertical section of the lip of one of the valves of the shellof Unio :—a, b, c, successive formations of the outer prismaticlayer; «, &, c, the same of the inner nacreous layer. the shell its whole interior is lined by a new nacreous lamina. inimmediate contact with that which preceded it. The…
Microscopy · Biology
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