File:Eptatretus stoutii egg and cleavage.jpg

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Description Fig. 162. Egg and cleavage in the marine lamprey, Polistotrema (Bdellostoma) stouti. After Dean, 1899.) (A) Animal pole end of the egg. (B) Surface view of blastodermic hillock, showing first cleavage furrow. (C) Same, second cleavage. (D) Third cleavages. (E, F) Later cleavages, strongly irregular. (G) Egg with shell removed.
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Source https://archive.org/details/comparativeembry00nels/page/327/mode/1up?view=theater&q=BLASTULATION+ Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illustrations.
Author Nelsen, Olin E.

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current17:58, 11 March 2024Thumbnail for version as of 17:58, 11 March 20241,304 × 741 (798 KB)Rasbak (talk | contribs){{Information |description=Fig. 162. Egg and cleavage in the marine lamprey, Polistotrema (Bdellostoma) stouti. After Dean, 1899.) (A) Animal pole end of the egg. (B) Surface view of blastodermic hillock, showing first cleavage furrow. (C) Same, second cleavage. (D) Third cleavages. (E, F) Later cleavages, strongly irregular. (G) Egg with shell removed. |date=1953 |source=https://archive.org/details/comparativeembry00nels/page/327/mode/1up?view=theater&q=BLASTULATION+ Comparative embryology o...

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