84 THE GE0L0C4IST. 



are launched from time to time, and offer to the searcher rich re- 

 wards. 



Curious too, indeed, in its geographical range is this tenacious 

 bolt of dark blue clay. For miles and miles the narrow band ex- 



Ligii. S.—Hamites rotundus. From the Gault. 



tends along, marked to the eye in winter by its moist and spongy 

 MM-diiiT, in summer by the arid bro^s of its scanty herbage and its 

 fnu'kod and Hssnred soil. All along its course grow stunted oaks j 



