Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 726
Embryonic development of Echinus:—A, Pluteus-larva atthe time of the first appearance of the disk; a, mouth in themidst of the four-pronged proboscis,- &, stomach ; c, Echinoiddisk; d, d, cl, d, four arms of the pluteus-body ; e, calcareousframework; /, ciliated lobes; g, g, g, g, ciliated…
Microscopy · Biology
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