PERMO -CARBONIFEROUS : PLATEAU LIMESTONE. 261 



but is probably nearly horizontal. Several large masses of the 

 hard blue limestone in which Fusulina are 

 usually found occur close by, but the ground 

 is so densely covered with vegetation, except along the path, that 

 the relation of these masses to the beds with bryozoa could not be 

 made out. The locality is within a mile of the slates and quartzites 

 of the Chaung-Magyi series at the foot of Loi Pan, and the only 

 rocks to be seen in the intervening ground are a few outcrops of 

 the ordinary Plateau Limestone. 



The third locality, Mong Pawn, is the one described by Mr. 



Middlemiss in the General Report for 1899- 



Stetes. UrrenCein S ' Sh * n 1900 alread y cited - The fossils usually occur 

 in thin-bedded, concretionary tabular limestones 

 with marly or shaly layers, exposed at various points along the 

 road from the 20th to the 30th mile east of Taunggyi. Their 

 manner of weathering, etc., is exactly the same as at iSfamun, and 

 as Mr. Middlemiss remarks, the best method of search is to wander 

 along the cuttings and pick out the fossils, chiefly brachiopoda, from 

 the crumbling surface of the beds. The position of the fossiliferous 

 strata here is the same as in the northern States, viz., resting upon 

 a series of massive white and grey limestones, often greatly brec- 

 ciated, which I have no hesitation in identifying with the ordinary 

 Plateau Limestone of this Memoir. 



In addition to these localities, beds containing Fusulina elongata, 

 Other loc- lities associated with corals and sometimes with 



brachiopoda, but in too ill-preserved or frag- 

 mental a state for identification, have been found at several other 

 places in the Northern Shan States, in patches of limestone that indicate, 

 by their mode of occurrence, the former widespread extension of this 

 formation over the plateau. I have already mentioned their occur- 

 rence at Tonbo, at the edge of the Irrawaddy valley, 13 miles to 

 the south-east of Mandalay. They have not been met with between 

 this place and the valley of the Nam-Tu south of Hsipaw, a dis- 

 tance of about 80 miles, but further to the east exposures of these lime- 

 stones become more frequent. Several large masses were found at Man- 

 maw (Loc. 36, H 3), in the valley of the. Nam Lnwng river, and 

 a broken line of outcrops of the same root has been traced 

 northwards from the neighbourhood of this place for some 12 miles, 

 forming a low but well defined ridge. At Manmaw some shelly 

 limestones also occur with badly preserved Productus, Spirifer, etc. 



