. Annals of the New York Academy of Sciences. Science. RECORDS. 375. Fig. 2. — Diagram of protoplasmic zones and their distribution at the first cleavage in different forms. A, immature egg, assumed to have no definite segrega- tion of protoplasmic stuffs. B, mature egg, with protoplasmic zones of horizontal stratification. C, first cleavage, division of the chromosomes. D, E, 1% different types of two-cell stage. D, Dentalium type, the lower zone isolated in one cell. E, Aiiiphioxiis, nemertine, or echinoderm type ; equal division of the zones. /', hypothetical type with complete separation o
. Annals of the New York Academy of Sciences. Science. RECORDS. 375. Fig. 2. — Diagram of protoplasmic zones and their distribution at the first cleavage in different forms. A, immature egg, assumed to have no definite segrega- tion of protoplasmic stuffs. B, mature egg, with protoplasmic zones of horizontal stratification. C, first cleavage, division of the chromosomes. D, E, 1% different types of two-cell stage. D, Dentalium type, the lower zone isolated in one cell. E, Aiiiphioxiis, nemertine, or echinoderm type ; equal division of the zones. /', hypothetical type with complete separation of two zones at the first 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 New York Academy of Sciences. New York, New York Academy of Sciences
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1877
