1876.] `- Recent Literature. TƏT 
some cases are of great geological antiquity. The relation of the present 
river valleys to folds and faults is discussed at length. The author finds 
that the relation of the direction of the streams to the dip of the rocks 
seine 
= _ in 
(Fie. 64.) A DIACLINAL VALLEY. 
(Fie. 65.) A CATACLINAL VALLEY. 
i | ivi i orders, transverse and 
is very complex. He divides the valleys into two ademas 
varieties are noticed: diachnal 
longitudinal, Of the first order three : £ 
(Figure 64), those which pass through a fold; cataclinal (Figure 65), 
VOL. X.— No. 12. 47 
