Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 818
Fig. 578.—Section of OrbitoidcsFurtisii, parallel to the surface,traversing, at a, a, the superficiallayer, and at b, b, the medianlayer. ORBITOIDES 761 species, circular in others, arranged with a general but not constantregularity in concentric circles (figs. 578, 579, b, b); the other,… … Fig. 579.—Portions of the section of Orliitoides Fortisii, shown in fig. 578,more highly magnified : a, superficial layer ; b, median layer. pieces of a dissected map (a, a). In the upper and lower walls ofthese last, minute punctations may be observed, which seem to bethe orifices of connecting…
Microscopy
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