File:Agelena labyrinthica twor stages in the laate development.jpg

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Description FIG. 201. TWO LATE STAGES IN THE DEVELOPMENT OF AGELENA LABYRINTHICA. A. Embryo from the side at the stage when there is a large ventral protuberance of yolk. The angle between the line of insertion of the permanent and provisional appendages shews the extent of the ventral flexure. B. Embryo nearly ready to be hatched. The abdomen which has not quite acquired its permanent form is seen to be pressed against the ventral side of the thorax. prl. procephalic lobe; pd. pedipalpi ; ch. chelicerae ; c.l. caudal lobe; pr.p. provisional appendages
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https://archive.org/details/theworks02balfuoft/page/442/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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current10:13, 2 March 2024Thumbnail for version as of 10:13, 2 March 2024863 × 645 (464 KB)Rasbak (talk | contribs){{Information |description=FIG. 201. TWO LATE STAGES IN THE DEVELOPMENT OF AGELENA LABYRINTHICA. A. Embryo from the side at the stage when there is a large ventral protuberance of yolk. The angle between the line of insertion of the permanent and provisional appendages shews the extent of the ventral flexure. B. Embryo nearly ready to be hatched. The abdomen which has not quite acquired its permanent form is seen to be pressed against the ventral side of the thorax. prl. procephalic lobe; pd....

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