Xcii PEUCEEDIXC+S OY THE GEOLOGICAL SOCIETY. ^vol. Ixxvii- 



liniitation of hviuiaii intellect, and of the voeabularv at its di.s- 

 posal. It is also one against Avhich geologists must be especially 

 on their 2,-uard. for the laiiEriiay'e which thev use is of such modern 

 origin that their special terms have not fully lost the connotation 

 of their origin, and. consequently, the difficulty of differentiating 

 between the special technical signiHcanee of the word on the one 

 hand, and the litemry. or litei'al. meaniny- of its deriAation. on the 

 otht-r. is ever present and especially great. 



