. Biological lectures delivered at the Marine Biological Laboratory of Wood's Holl [sic]. Biology. :Qy'B':^/-;^:P"---^'--''^'"''' ' Fir, MPfeSJ Fig. 2. Figs, i and 2. — Sections of eggs of Crefiidula plana, showing prophase and metaphase of first cleavage. is indicated by spiral asters, first described by Mark for Liviax, and since observed by several investigators in other animals, and also by my observation that the first cleavage in Crepi- dula is a spiral one, being oblique to the right, or Please note that these images are extracted from scanned page images tha

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. Biological lectures delivered at the Marine Biological Laboratory of Wood's Holl [sic]. Biology. :Qy'B':^/-;^:P"---^'--''^'"''' ' Fir, MPfeSJ Fig. 2. Figs, i and 2. — Sections of eggs of Crefiidula plana, showing prophase and metaphase of first cleavage. is indicated by spiral asters, first described by Mark for Liviax, and since observed by several investigators in other animals, and also by my observation that the first cleavage in Crepi- dula is a spiral one, being oblique to the right, or 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 Marine Biological Laboratory (Woods Hole, Mass. ). Boston, Ginn & Co

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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectbiology