ENDwoH.] SOUTHERN AREA — RESUME. 141 



Besides the Tertiary sr()ii])s, the sand-dnnes of thiw area, furnished a 

 subject of great interest. \Ve liad an excellent ojiportunity of studyinj^ 

 llieni and obtained some instructive data. Their b<;havior -with refer 

 <>nce to bodies of standinji' Avater is singular, and yet natural when 

 understood. More striking than the occurrence of the dunes is tliat of 

 the mud-springs. IJut lew localities are known where tlu^y exist, and 

 nevTr, to my knowledge, haAC they been found to exhibit tlie same type 

 as within our district. 



