Great Falls of the Tji-Tarum, near Tji-Jahang. 257 



the Tji-Tangkil, where, in close proximity to the dykes of 

 trachyte, several well-preserved conchylia were found amid 

 the rubbish that had been detached from the sides of this 

 cavity, which are composed of a sort of muddy tufa. 

 After riding at full speed through a thinly-inhabited mountain 

 district, in order to avoid an impending thunder-storm, we 

 luckily reached the little mountain village of Gunung-Alu, 

 lying on the Tji-Dadass, at the foot of a mountain ridge, 

 which forms the water-shed between the northern and south- 

 ern coasts of Java. 



" On 2 1st- May we set off for the valley of the Tji-Lanang, 

 which stretches beneath the steep sandstone acclivities of 

 the Gunung Sela, another spot where petrifactions are ex- 

 ceedingly abundant, and where the remains of the fossils may 

 be observed in the position they originally occupied, im- 

 bedded in the strata of mud and sandstone. A species of 

 fossil resin is also frequently found there, in juxtaposition 

 with other beautiful fossils. From this point we followed the 

 valley of the Tji-Lanang in a northerly direction, and on 

 quitting it we came upon a little traversed road leading to 

 tlie valley of the Tji-Tjamotha, at the calcareous-brecciose 

 rocks of Batu-Kakapa, and still further on reached the moun- 

 tainous village of Tji-Jabang, whence we descended once 

 more to the river Tji-Tarum, which at this point passes 

 tln-ough a narrow cleft in the rock, more than a thousand 

 feet deep, forming thus the grandest waterfall in Java, as it 

 breaks through the western barrier range of the plateau 



VOL. n. 



