Vol. 58. | CRYSTALLINE LIMESTONES OF CEYLON. Alas 
On a small pale-green individual, weathered out, Mr. Graham 
has determined the forms (011) (110) (O10). 
. Mr. W. C. Hancock has analysed the colourless variety from this 
locality, with the following result :— . 
Per cent. \ 
2 (CII Res pcoenenconoseocecemonederoce 0°30 | 
PMOrCCombined ) © jcc. uc ke asinsues dos - 0-60 : The presence of 
Oe secre ee ee ee es tee 47:04 |so much soda and 
Al,O, (with a trace of iron-peroxide)... 13°76 et presum- 
SING ee ee ene Wane siali eas lors 13:39 {ably intreduced 
AIELO it ee RSE ee ech ac donsacoc oa ae berabs Occ 21-26 from the granulites, 
INOS epee ton: co tocebea adn obce serene: 4.01 is interesting. 
Se 
100°36 
Specific gravity =2-92 
A dark-brown amphibole occurs in lumps of lmestone with 
brown mica, in a field east of the railway near Wariapola, near 
Matale. The crystals are frequently idiomorphic. Mr. Graham has 
determined the forms (100) (010) (110) (310) (011) (101). In 
thin sections this amphibole is quite colourless. Cleavage-flakes 
show an extinction-angle of about 21° on m (110). 
Many varieties are quite colourless, even macroscopically ; others 
are pale-green, greenish-brown, or dark-brown, but colourless or 
pale in thin sections. Others, especially those occurring definitely 
as contact-minerals, show colour in the slides and have a normal 
pleochroism, not so strong, however, as that of the amphiboles which 
occur in the pyroxene-granulites themselves. Amphibole darker than 
any of those referred to above, and resembling the amphibole of the 
pyroxene-granulites, is found with green diopside, dark mica, and 
dark-green spinel, in the heavy green rocks which seem to separate 
the limestones from the granulites in some localities. 
(7) Scapolite is quite unusual as an accessory mineral in the 
limestones themselves. It may also be met with in mineral- 
aggregates in limestone, as for example in an inclusion measuring 
7xX3x4 inches from Palugama (Pl. XIV), consisting of diopside, 
phlogopite, plagioclase, scapolite, and calcite. Another aggregate 
consisted of diopside partly granular, partly intergrown in beautiful 
graphic fashion with scapolite and a few individuals of orthoclase. 
Probably such aggregates correspond to inclusions of pyroxene- 
granulite, which being small have been much modified by the 
formation of lime-silicates. Hence they are not included in the list 
of mineral-ageregates on p. 403, which refers rather to aggregates 
of minerals especially characteristic of the limestones themselves. 
Scapolite is, however, very characteristic of the peripheral parts of 
sills and.inciusions of pyroxene-granulite in the limestones, where it: 
is usually accompanicd by sphene. Thus the peripheral portion of 
the pyroxene-granulite sill described on p. 409 consists of diopside, 
phlogopite, pyrite, and scapolite; while the rock in contact with the 
Herimitigala limestone, as seen in fallen blocks, is a fine scapolite- 
augite rock. Many other localities could be named. In such 
