Studies on the embryology of the Sipunculidae. I. The embryonal envelope and its homologue. ...
By John H. Gerould.

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Main Author: Gerould, John Hiram, 1868-1961.
Language(s): English
Subjects: Sipunculidae.
Annelida.
Physical Description: 1 p.l., [439]-452 p., plate, 31 cm.
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