. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. D Views of Amblyopsis, in the early stages. A and B. Embryos on egg, (A) younger stage, (B) older stage. C. Larva at time of hatching. D. Older 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 Eigenmann, Carl H. , 1863-1927. Washington, D. C. , Carnegie Institution of Washington

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