326 Geological Society : — 



old sedimentary rocks, whilst, the northern is occupied by newer 

 Tertiary deposits and basaltic rocks — the former consisting of shales 

 and limestones, in which the author found some fossils inducing 

 him to refer them to the Trias. These are succeeded by some 

 dark-coloured shales, slates, and sandstones, dipping at a high angle 

 to the north. 



On the denuded edges of these the newer Tertiaries rest, consisting 

 of sandstones interstratified with basaltic rocks. These latter in- 

 crease in thickness till just beyond Kulja an old " somma " is 

 reached, with perpendicular walls rising to a height of 1500 feet 

 above the river. The cone of the volcano has disappeared by sub- 

 sidence. 



The third ridge, " Terek -tagh," consists of old sedimentary rocks, 

 chiefly limestones. 



20. " Note upon a recent Discovery of Tin-ore in Tasmania." By 

 Charles Gould, Esq., B.A., E.G.S. 



In this paper the author states that the ore has been found in 

 large masses in situ, and that the containing rock is lithologically 

 distinct from the ordinary ternary granite which forms the whole 

 of the stanniferous country of Queensland. The discovery was 

 made at Mount Bischoff, in the N.W. portion of Tasmania ; but, as 

 the district is covered by scrub, an exact estimate of the exposed 

 area of stanniferous rock is as yet impossible. It does not appear to 

 exceed a few hundred acres. Large quantities of stream-tin have 

 been already obtained. 



21. " Note on the occurrence of a Labyrinthodont in the Yore- 

 dale Rocks of Wensleydale." By L. C. Miall, Esq. 



The author briefly describes a specimen, discovered by Mr. "W. 

 Home, of Leyburn, in the Lower Carboniferous Rocks there, com- 

 prising casts of five bones. Two of these are probably tibiae. Owing 

 to their fragmentary nature the others cannot be accurately deter- 

 mined. The author considers that these bones belong to an animal 

 of higher rank than any known fish, and thinks that the Lower 

 Coal-measures of Glasgow (with Loxomma) may be of earlier date 

 than the Yoredale Rocks. 



22. " Geological Notes on the Route traversed by the Yarkund 

 Embassy, from Shahidulla to Yarkund and Kashgar." By Dr. F. 

 Stoliczka, E.G.S. 



The author described the rocks observed by him along the course 

 of the Karakash river and through the Sanju pass as chiefly meta- 

 morphic and very highly inclined, until near Yam sedimentary 

 rocks rest unconformably on the schists. These are probably 

 Palaeozoic. Later rocks occur near the camp Kiwaz, some re- 

 sembling the rocks of the Nahim group and underlain by deposits 

 containing Carboniferous fossils. At Sanju coarse grey calcareous 

 sandstones and chloritic marls of Cretaceous age occur. True Loss 

 occurs in some of the valleys. 



