Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 918
nyskeleton corresponds so closely with the sponge-tissues which cau MICKOZOIC CONSTITUENTS OF CHALK. 827 be recognized in sections of nodular Flints, Agates,* &c, as tomake it clear—when taken in connection with correspondence ofexternal form—that such flints are really fossilized sponges,… … Microscopic Organisms in Chalk from Meudon ; seen partly as opaque,and partly as transparent objects. minute bodies termed Xanthidia, which bear a strong resemblanceto the sporangia of certain Desmidiacece (Fig. 158, d) ; and theAuthor has found similar bodies in the midst of what appears tobe…
Microscopy · Biology
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