Carpenter, William Benjamin, 1813-1885 · London : John Churchill · leaf 579
ce is per-vaded (as often happens) with a colouring matter of somedepth, or when we look at a very thin section by the black-ground illumination. Around the innermost circle of thesesolid pillars, there is another layer of the calcareous network,which again is surrounded by another circle of solid… … Portion of transverse section of Spine of Acrocladia mcmmillata. of the spine. Around the cup-shaped base of the spine is amembrane which is continuous with that covering the surfaceof the sheU, and which serves not merely to hold-down the cupupon the tubercle over which it works, but also, by its…
Microscopy
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