File:Astacus embryo.jpg

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Description FIG. 238. TWO LONGITUDINAL SECTIONS OF THE EMBRYO OF ASTACUS. (From Parker ; after Bobretzky.) A. Nauplius stage. B. Stage after the hypoblast cells have absorbed the food yolk. The ventral surface is turned upwards, fg. stomodeum ; hg. proctodeum ; an. anus ; m. mouth ; mg. mesenteron ; abd. abdomen ; h. heart.
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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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current18:46, 2 March 2024Thumbnail for version as of 18:46, 2 March 2024543 × 818 (399 KB)Rasbak (talk | contribs){{Information |description=lG. 238. TWO LONGITUDINAL SECTIONS OF THE EMBRYO OF ASTACUS. (From Parker ; after Bobretzky.) A. Nauplius stage. B. Stage after the hypoblast cells have absorbed the food yolk. The ventral surface is turned upwards, fg. stomodseum ; hg. proctodccum ; an. anus ; m. mouth ; mg. mesenteron ; abd. abdomen ; h. heart. |source=https://archive.org/details/theworks02balfuoft/page/512/mode/2up?view=theater&q=blastoderm THE WORKS OF FRANCIS MAITLAND BALFOUR VOL. III A TREATIS...

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