Chalk Sponge Gastrula
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Description: "Gastrula of a Chalk-sponge (Olynthus). B, longitudinal section through the axis: g, primitive intestine; o, blastopore; i, inner cell-layer of the body-wall; e, outer cell-layer." -Whitney, 1911
Source: Whitney, William Dwight The Century Dictionary: An Encyclopedic Lexicon of the English Language (New York: The Century Co., 1911) 3: 2466
Keywords: gastrula, chalk sponge, Olynthus, section, embryo, primitive intestine, blastopore, cell layer
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