PERMIAN FOSSILS. g 



The saddle north-east of Chitichun No. I, which is composed of 

 intrusive igneous rocks, is joined by a long ridge, running along the 

 Chaldu river in a north-eastern to northern direction. It is capped 

 by masses of limestone, quite similar in their appearance to the crag 

 of Chitichun No. I. They form the highest points of the ridge, and 

 some of them exhibit quite picturesque outlines. That they are in 

 reality only a continuation of the crag of Chitichun No. I, has been 

 proved by an examination of the rocks of their most south-western 

 promontory. But we could neither work out the details of their 

 structure nor decide whether they form one continuous range or a 

 row of smaller independent masses. It is however an indisputable 

 fact, that their strike gradually passes from a north-eastern into a 

 northern direction. The entire row or zone of crags, the centre of 

 which is marked by the peak of Chitichun No. I, consequently 

 describes a flat semi-circle with its convexity turned to S. E. 



A third row of crags, considerably shorter however, is indicated 

 by three small blocks to the west and north of Lochambel-ki-chak 

 encamping ground, and by an outcrop of upper triassic limestones 

 (Dachsteinkalk ) in the Spiti shales west of the Chitichun river and 

 about 2 miles north of the last mentioned encamping ground 

 This latter outcrop may however turn out to be only an inlier of 

 the upper-triassic limestones of the peak Chaldu No. II (17 u feet) 

 from which the overlying Spiti shales have been denuded. 



Per??iian fossils.— Among the three small blocks to the west and 

 north of Lochambel-ki-chak encamping ground, one has yielded Pro- 

 ductus semi-reticulatuS) and is therefore probably of the same age as 

 the permocarboniferous limestone crag of Chitichun No. I. It is 

 situated about half a mile to the north of the camping ground and is of 

 sufficiently large size to exclude the probability of having rolled down 

 from the eastern slope of Chitichun No. I. Half a mile further to the 

 north, near the pass which leads into the valley of the Chaldu river 

 is a triassic crag with layers of shell-limestone, made up of Mono- 

 phyllites and Xenaspis (?). The third block, situated in a narrow 



( 9 ) 



