600 ME. A. K. COOMABA-SWAMY ON [Aug. 10,00, 



statues. ' Cipolins ' from the neighbourhood of Kandy were recorded 

 by Prof. Lacroix. 



Hakgala. — The 'limestone' is found on the Albion Estate, 

 where it has been quarried to a slight extent. The rock is white 

 and crystalline, its texture varying from somewhat coarsely crys- 

 talline to saccharoidal. It contains abundance of sky-blue apatite, 

 and much white or pale greenish mica ; the latter occurs most 

 frequently in the joints, forming six-sided crystals, and is found also 

 in the rock-mass. Under the microscope the rock is seen to 

 consist largely of colourless monoclinic pyroxene (perhaps sahlite) 

 with also apatite, analcite (?), and a little calcite and muscovite: 

 the whole being very granular, and the constituent minerals often 

 confusedly intergrown. 



The pale mica has the optical characters of a biotite. Part of a 

 fresh-looking crystal was supplied to Mr. Shepherd, E.I.C., for 

 analysis, with the following result : — 



SiO 4072 



A1 2 ; 26-38 



Fe. ; 0, trace 



MgO 1427 



KX) 10-36 



F" -78 



Loss on ignition 7'63 



Organic matter trace 



10014 

 2 replaceable by F -33 



J)9-81 



Specific gravity = 2 '57 



Talatuoya (near Kandy). — Much limestone is exposed on the 

 1 Mica Estate.' The rock is white, with occasional prisms of blue 

 apatite, flakes of white mica, or flakes of graphite. The white 

 carbonate is probably dolomite, showing under the microscope little 

 twinning and bright interference-colours. 



Limestone exposed on the road between Talatuoya and Kandy is 

 very coarsely crystalline, and without the accessory minerals. 



(9) Microcline-Gneiss. 



This rock occurs in the country north of Matale, and with other 

 gneisses forms the solitary hills which suggested to Prof. Walther 

 the term domoid gneiss. The rocks are well-banded. Their 

 constituent minerals include microcline (as a rule slightly micro- 

 perthitic), orthoclase-microperthite, quartz, plagioclase, and small 

 quantities of pyroxene, hornblende, biotite, muscovite, pyrite, apatite, 

 and zircon. 



Bambulla. — A steep black rock rises not far from the village, 

 with, near its summit, a series of Buddhist rock-temples. A, 



