File:EB1911 Lamellibranchia - embryo of Pisidium pusillum - optical sections.jpg

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English: Embryo of Pisidium pusillum in optical median section showing the invaginated cells hy which form the arch-enteron, and the mesoblastic cells me which are budded off from the surface of the mass hy, and apply themselves to the inner surface of the epiblastic cell-layer ep. C. The same embryo focused so as to show the mesoblastic cells which immediately underlie the outer cell-layer.
Date published 1911
Source “Lamellibranchia,” Encyclopædia Britannica (11th ed.), v. 16, 1911, p. 120, fig. 25.
Author Lankester?
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Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

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current18:21, 17 April 2019Thumbnail for version as of 18:21, 17 April 2019831 × 524 (106 KB)Bob Burkhardt (talk | contribs){{Information |description ={{en|1=Embryo of ''Pisidium pusillum'' in optical median section showing the invaginated cells ''hy'' which form the arch-enteron, and the mesoblastic cells ''me'' which are budded off from the surface of the mass ''hy'', and apply themselves to the inner surface of the epiblastic cell-layer ''ep''. C. The same embryo focused so as to show the mesoblastic cells which immediately underlie the outer cell-layer.}} |date =published 1911 |source =“Lame...

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