112 



GLEANINGS FROM NATURE. 



comes out into the second passage, fifty feet from its 

 starting point. From here onward for 210 feet the 

 lower passage leads through a water-worn crevice 

 from two to four feet wide and three to fifteen feet 

 high, the stream sometimes covering 

 its bottom, and again running in a. 

 channel cut beneath one or the other 

 of the sides. 



In this stream were found two spe- 

 cies of small crustaceans. One was a 



fl/ir or CUBJ Cm. 



Monror County, /no. 



Fig. 26. 



shrimp, Crangonyx -gracilis Smith, three-fourths of an 

 inch or less in length, which is often found in wells 

 and springs in central Indiana, and had probably been 



