64 
SPOLIA ZEYLANICA. 
X— Kaolin. 
4 specimen from Alutwela, Teldeniya, Central Province, 
collected by Mr. James Parsons, was examined at the Imperial 
Institute with the following results. The material “was of a 
yellowish pink colour : it contained small quantities of graphite 
and of ferruginous decomposition products. When mixed with 
water it furnished a paste which was only slightly plastic. It 
would only be suitable for the manufacture of common bricks.” 
Analysis. 
Si0 2 
... 43*56 
H 2 O (combined) .. 
. 11*90 
A1 2 o 3 
... 34*77 
H 2 O (moisture) 
5*63 
Fe 2 0 3 
... 3*40 
-- 
Na 2 0 
0*36 
99*90 
k 2 0 
0*28 
— 
XI.—-Sphene. 
This mineral is almost always present in rocks of the Galle 
group at Galle, and is then sometimes idiomorphic. It is common 
also in rounded grains in many limestone granulite contact rocks. 
Some crystals were observed in a vein of pegmatite exposed in 
a small graphite pit near Talatu-oya (near Kandy,Central Province), 
the pegmatite and associated green and white rocks resembling 
those of Galle, but not containing wollastonite. The pegmatite 
consisted chiefly of quartz, orthoclase, and pyroxene very coarsely 
crystallized, with a considerable quantity of graphite in flakes 
and scales occuping cracks and spaces in the other minerals, and 
evidently deposited subsequent to their formation. One of the 
individuals of sphene was measured by Mr. G. F. Herbert Smith 
and found to present the forms c (001), m (110), and n (111). 
XII.— Mispickel. 
Mispickel (arsenical pyrite) occurred in a quartz-felspar- 
tourmaline rock sent in by Mr. W. A. Theobald from Little Valley, 
Deltota. The material is silvery white, of irregular form, and 
gives good reactions for arsenic. The greater part of the rock in 
which it occurs consists of an intergrowth of quartz with black 
tourmaline—a type not infrequently met with; the presence of 
felspar (decomposed) is less usual. The arsenical pyrite has not 
been previously recorded for Ceylon. 
