Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 867
ied by avery open network (fig.614); and this is boundedby a r ow of transparentspaces (like those at a ofib b% c c, etc. fig. 617),which on a cursory in-spection might be sup-posed to be void, but areFro. oio.—One of the segments of the calcareous found on closer examina-skeleton oi an ambulacra!… … SPINES OF ECHINOIDS either examine a section of a spine whose substance is pervaded (asoften happens) with a colouring matter of some depth, or when welook at a very thin section by black-ground illumination. Aroundthe innermost circle of these solid pillars there is another layer ofthe calcareous…
Microscopy
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