958 LA TOUCHE: GEOLOGY OF NORTHERN SHAN STATES. 



Lashio railway traversed by Mr. Datta and myself in the same 

 year, except at Tonbo, where it was not till several years after- 

 wards that Fusulina was discovered ; but they become more and 

 more prominent as we proceed from the line of the railway to- 

 wards the south and south-east. 



Mr. Middlemiss' find is described in the General Keport, Geol. 



Surv. Ind., for 1899-1900, p. 137 et seq. The 

 Situation and char- foggilg werg collected f rom a geries 0 f thin band . 



actors ot beds. 



ed, shaly and marly limestones, extending along 

 the Government cart-road leading eastwards from Taunggyi, the head- 

 quarters station, from a point about 20 miles east of that place to 

 Mong Pawn, a distance of about 10 miles. They are generally to be 

 found lying loosely on the weathered surface of the rocks, as at 

 .j Padaukpin, and among them Mr. Middlemiss 



was able to recognise such well known Salt 

 Ptange forms as Athyris (Spirigera) Royssii L'Ev., Spirigerella Derbyi 

 Waag., Chonetes grandicosta Waag., etc., and to correlate the beds 

 with the middle Productus Limestone of that area, an opinion 

 which has since been amply confirmed by Dr. C. Diener, who has 

 examined and described the Anthracolithic fauna of this region. 1 

 In the Northern Shan States the presence of rocks belonging 



to this horizon was first discovered by Mr. P. 

 fo2f inal discovery ° f N. Datta, who in 1901 notified the occurrence 



of Fusulina in a limestone band at the crest 

 of a ridge a few miles west of Tong-Ang ferry on the Nam-Tu 

 (Loc. 32, F 3), and still further to the east at Ho-un (Loc. 35, H 3). 

 A few badly preserved shells were also collected by him near Man- 

 kang on the north slope of the Loi-len range (Loc. 33, H 1). 

 Subsequently other exposures of limestone with Fusulina were found, 

 and in addition a fairly rich brachiopod and bryozoan fauna, which has, 

 m the hands of Dr. Diener, proved the existence of strata of Permo- 

 Carboniferous or Anthracolithic age over a large area in these 

 States. 



The fossils described by Dr. Diener were collected at three 

 _, ., . , widely separated localities, only one of which, 



lossil localities. ; _ - . J , 



Namun (Loc. 34. (J 3), is actually situated 

 in the Northern States, and is therefore, strictly speaking, 

 included within the area now being described ; but Kehsi Man- 



1 The Anthracolithic fossils of the Norfcherq Shan, States; Pal. Ind., New Ser., 

 Vol. III., Mem- No. 4. 



