Plate 2 — Views of specimen no. 1: f, on painted squares, 2 cm. sq. (after four days); g, do., 1 cm. sq. (after seven days); h, do., 1 cm. sq. (after four days); i, do., 2 mm. sq. (after one day). (1911) by Francis Bertody Sumner, from Journal of Experimental Zoology.

Source: MBLWHOI Library / Internet Archive

https://pdimagearchive.org/images/2b7d8cb7-1a77-4110-b5e0-8851690c5a9d

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