. The American Arbacia and other sea urchins. Sea urchins; Arbacia punctulata; Sea urchins -- Embryos; Biology -- Research. 1. Unfertilized 2. Fertilization 3. 3 min 4. 3V2 min. 5. 10 min 9. 45 min /--Ox 1J J 13. 13/a hrs 6. 25 min 7. 35 min. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvey, Ethel Browne, b. 1885. Princeton, Princeton University Press

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Keywords: ., bookcentury1900, bookpublisherprincetonprincetonuniversitypress