THE MINERALS OF THE CLYDE DRAINAGE AREA. 551 



89. Vesuvianite or Idocrase, a basic calcium-aluminium silicate. Cowal 



district. 



90. Zircon, ZrSiO 4 Strontian. 



91. Sillimanite or Fibrolite, Al 2 SiO 5 Glen Fyne : Cowal. 



92. Datholite or Datolite, HCaBSiO- Kilpatrick : Bishopton : Barrhead. 



93. Zoisite ? HCa 2 Al 3 Si 3 O 13 Cowal district. 



94. Epidote, HCa 2 (AlFe) 3 Si 3 13 Bute : Arran. 



95. Prehnite, H 2 Ca. 2 Al._>Si 3 O 12 Bowling : Barrhead : Bishopton. 



96. Calamine, HZn. 2 SiO 5 Leadhills. 



97. Tourmaliue, a complex silicate of boron and aluminium. Cowal district. 



98. Okenite, 2HoOCaO2SiO 9 Carleton Castle. 



99. Apophyllite,~K 2 O. 8CaO. 16Si 2 0. 16H 2 O Kilpatrick Hills : Strontian. 

 99A. Zeolites. 



100. Heulandite, H 4 CaAl 2 Si 6 O ls + 3H 2 O Kilpatrick Hills : Little Cumbrae. 



101. Brewsterite, H 4 (SrBaCa)Al 2 Si 6 Cf 18 + 3H 2 O Strontian. 



102. Harmotome, H.,(K,Ba)Al.,Si-O 15 + 4H 2 O" Strontium : Campsie Hills: 



Kilpatrick Hills. 



103. Stilbite, H 4 (Na. 2 Ca)Al 2 Si 6 18 + 4H 2 O Cochno : Campsie Hills: Arran: 



Little Cumbrae. 



104. Laumontite, H 4 CaAl 2 Si 4 O 14 -f 2H 2 O Kilpatriek, Campsie Hills: Ren- 



frewshire Hills. 



105. Chabazite, (CaNa 2 )ALSi 4 + 6H 2 O Kilpatrick Hills : Kilmalcolm : Dairy. 



106. Levynite, CuAUSl-jO^ + SHXT Hartfield Moss. 



107. Analcite, NaAlSioOy + H.,O Ban-head: Port-Glasgow: Inverkip : Kil- 



patrick Hills : Strontian. 



108. Cluthalite, var. of Analcite with flesh-red crystals. Bowling : Little 



Cumbrae : Fergushill Ha', Kilwinning. 



109. Edingtonite, BaAl 2 Si 3 O 10 + 3H 2 O Kilpatrick Hills. 



110. Glottalite, var. of Edingtonite Port-Glasgow. 



111. Natrolite, Na.,Al.,Si 3 O 10 + 2H.,O. Kilmalcolm: Port-Glasgow: Campsie 



Hills: Kilpatrick HiUs : Cowal : Cloch. 



112. Galacite, var. of Natrolite Berry Glen, Ayrshire. 



113. Scolecite, CaAl 2 Si 3 O 10 + 3H. 2 O Kilpatrick Hills. 



114. Mesolite, Composition between Natrolite and Scolecite. Kilpatrick 



Hills : Hartfield Moss. 



115. Thomsonite (Na 2 Ca)Al 2 Si,O 8 + H. 2 O Bowling : Kilmalcolm: Port-Glas- 



gow. 



116. Doliauite, a doubtful Zeolite Knock Station, Ayrshire. 

 116A. Mica Division. 



117. Muscovite, H 2 KA1 3 (S 2 O 4 ) 3 In granites and sandstones. 



118. Sericrte, a variety of Muscovite In schists of the Cowal district. 



119. Agalmatolite ? an amorphous mineral with a composition near muscovite 



Cowal district. 



120. Paragonite, sodium mica Cowal district. 



121. Lepidolite, Lithium Mica Argyleshire. 



122. Biotite, Magnesium-iron Mica Dairy : Cowal. 



123. Haughtonite (Hecldle), same as Biotite. 



124. Clinochlore, H 8 (MgFe) 5 Al. 2 Si 3 O 18 Inveraray. 



125. Prochlorite or Chlorite, H 40 (FeMg) 23 Al 14 Si 13 O 90 Cowal district. 



126. Delessite, H 10 (MgFe) 4 (AlFe) 4 Si 4 O 22 " Bowling : Dumbuck : Long Craigs. 



127. Chlorophaeite of Macculloch, a chloritic mineral. Loch F_yne : 



Strachur. 

 127 A. Serpentine and Talc Division. 



128. Serpentine, H 4 Mg 3 Si 2 O 9 Lendalfoot : Colmonell : Innellan. 



129. Antigorite, a variety of Serpentine Tow r ard. 



130. Chrysotile, a fibrous variety of Serpentine Lendalfoot : Games Loup. 



131. Talc or Steatite, H 2 Mg 3 Si 4 O 12 Toward : Bute. 



