Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 902
at their lower ex-tremities, would appear alsofrom the fact that where theshell presents a deep colour (asin Pinna nigrind) this colouris usually disposed in distinctstrata, the outer portion of each layer being the part most deeplytinged, whilst the inner extremities of the prisms are almost… … Fig. 637.—Section of the shell of Pinnain the direction of its prisms.
Microscopy
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