. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. 74 BLIND VERTEBRATES AND THEIR EYES. The author has also taken this species in a small cave at the edge of the town of Glasgow, Kentucky, where it is moderately abundant and easily accessible, but on account of the limited extent of the environment very few were caught on any one trip. One was found under a floating board in this cave. One other speci- men was secured after an extensive exploration on foot and on hands and knees in a cave at Cave City, Kentucky. Typhlichthys osborni Eigenmann. Typhlich
. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. 74 BLIND VERTEBRATES AND THEIR EYES. The author has also taken this species in a small cave at the edge of the town of Glasgow, Kentucky, where it is moderately abundant and easily accessible, but on account of the limited extent of the environment very few were caught on any one trip. One was found under a floating board in this cave. One other speci- men was secured after an extensive exploration on foot and on hands and knees in a cave at Cave City, Kentucky. Typhlichthys osborni Eigenmann. Typhlichthys osborni, Eigenmann, Biol. Bull., vm, p. 63, Horse Cave, Ky. Typhlichthys osborni is known only from Horse Cave, Kentucky. The town of Horse Cave is situated at the junction of two intersecting valleys. Their streams. Fig. 20. (a) Side and (b) Dorsal View of Head of Typhlichthys osborni. have long ago disappeared from the surface and now flow 185 feet beneath the city. In the heart of the town is a sink or depression with vertical walls which was prob- ably caused by the falling of the roof of a large cavern. At one end of the sink an inclined plane leads into the underground stream, which supplies the city with water. The stream also furnishes the power to light the city. A dam across the cave furnishes the head for the power, but so modifies the conditions above it as to make collecting practically impossible. A convenient break in the dam made. 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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