. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. EIGENMANN. Living Stygicolas. Position of body and fins in swimming and differences in color of different 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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