Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 907
om those of the Mollusca. When thin sections of them aremicroscopically examined, they exhibit the appearance of Ion- flat-tened prisms (fig. 642, A, b), which are arranged with such obliquity 850 MOLLUSCA AND BEACHIOPODA that their rounded extremities crop out upon the inner surface of theshell in… … .Fig. 642.—A, internal surface, a, and oblique section, b, of shell of Waldheimiaaustralis ; B, external surface of the same, which generally pass nearly perpendicularly from one surface to theother (as is shown in vertical sections, fig. 643), and terminate inter-nally by open orifices (tig. 642,…
Microscopy
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