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File:Palaemon development embryo.jpg

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Description FlG. 239. TWO STAGES IN THE DEVELOPMENT OF PALAEMON SEEN IN SECTION. (After Bobretzky.) A. Gastrula stage. B. Longitudinal section through a late stage, hy. hypoblast ; sg. supra-oesophageal ganglion ; vg. ventral nerve cord ; hd. proctodseum ; st. stomodseum
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https://archive.org/details/theworks02balfuoft/page/512/mode/2up?view=theater&q=blastoderm THE WORKS OF FRANCIS MAITLAND BALFOUR VOL. III

A TREATISE ON COMPARATIVE EMBRYOLOGY.
Author M. FOSTER, F.R.S., ADAM SEDGWICK, M.A.,

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current18:59, 2 March 2024Thumbnail for version as of 18:59, 2 March 20241,279 × 662 (828 KB)Rasbak (talk | contribs){{Information |description=FlG. 239. TWO STAGES IN THE DEVELOPMENT OF PALAEMON SEEN IN SECTION. (After Bobretzky.) A. Gastrula stage. B. Longitudinal section through a late stage, hy. hypoblast ; sg. supra-oesophageal ganglion ; vg. ventral nerve cord ; hd. proctodseum ; st. stomodseum |source=https://archive.org/details/theworks02balfuoft/page/512/mode/2up?view=theater&q=blastoderm THE WORKS OF FRANCIS MAITLAND BALFOUR VOL. III A TREATISE ON COMPARATIVE EMBRYOLOGY. |date=1885 |author=M. FOST...

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