224 



Summing up the facts, then, in few words these rocks are of limited oc- 

 currence, covering a few hundred acres all told ; they are found at rather 

 low elevations in the hills though they sometimes occur as far as the very 

 tops of the highest points in the ridge country; they have yielded fossils 

 of lower or eocene tertiary age ; they have probably resulted from weath- 

 ering processes ; are metamorphic in character ; and have no history of 

 dynamic origin or of present or past dynamic change. Their former ref- 

 erence to the paleozoic is no longer tenable and they stand as a unique 

 instance of the induration of soft sandstones in the southwest. 



The sketch map accompanying gives that portion of Crowley's Ridge in 

 which indurated sandstones have been found. It will serve to indicate 

 the relations of the ridge to the low-lying country surrounding as well as 

 helping to make clear the geographic distribution of the quartzites. 



The white clays of Indiana. By Amos W. Butler. Published in the 

 Trans, of the Ind. Horticultural Soc, for 1893. 



BIOLOGY. 



On the habits of turtles. By A. W. Butler. 

 [Abstkact.] 

 In the White Water valley the soft-shelled turtles are never found act- 

 ive in winter. They seem to seek the deepest water and then bury be- 

 neath the surface of the mud or sand. They disappear earlier in the fall 

 and reappear later in the spring than the hard shelled forms. They rarely 

 appear before April 15th, and sometimes not until about May 1st. In the 

 canal none have ever been found in winter. Possibly they seek the deeper 

 water. The hard-shelled turtles winter in the more shallow water, and 

 seem to prefer a mud bank where a musk rat hole has caved in. There 

 they may be found by prodding with an iron rod. 



On the occurrence of kirtland's warbler {Dendroica hirtlandi Baird) in 

 Indiana. By A. B. XJlrey. 

 Owing to the rare occurrence of Kirtland's Warbler in North America 

 and the fact that its life-history is almost entirely unknown, considerable 



