TEN INDIANA CAVES. 



117 



slowly with its antennae spread out before it, and 

 gently waving to and fro, feeling, as it were, every 

 inch of its way. It is 

 wholly non-sensitive to 

 light, and seemingly so 

 to sound, but when dis- 

 turbed by any move- 

 ment in the water it is 

 extremely active ; much 

 more so than ordinary 

 terrestrial forms, leap- 

 ing upward and back- 

 ward with quick, pow- 

 erful, downward blows 

 of its abdomen. 



Several branches 

 leave the main passage 

 of Shiloh Cave, but all 

 but one are short in 

 length. The one ex- 

 ception turns to the 

 right about 1,500 feet 

 from the entrance and 

 extends in a south- 

 westerly direction. At 

 first it is a high, narrow fissure with the jutting 

 walls bearing many stalactites. A stream of water 

 covers the entire floor and from far in the distance 

 comes a murmuring sound caused by a succession of 

 water-falls, four in number and in size small, which 

 occur at short intervals along the passage. Wading 

 through pools, clinging to corners of jutting ledges, 



Fig. 28 Blind Crayfish. 

 (Three-fourths natural size.) 



