. An introduction to the study of zoology. Zoology. EMBRYOLOGY AND REPRODUCTION. 71 mouth; it is called the Blastopore. The outside is the skin layer or epiblast, of which we spoke in Chapter III., the inside is the stomach layer, or hypoblast, aad. 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 Lindsay, B. London, S. Sonnenschein

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895