27(5 Sir C. L. Giesecke^s Account fS)C. [April,' 



69 — 70. Ditto, in rhomboids, and three-sided pyramids, accom- 

 panied by galena, massive quartz. 



71 — 72. Common quartz, pearl-grey, from the same place. 



73. Ditto, somewhat iron-shot. 



74 — 75. Calcareous spar, of yellowish-white colour, massive, 

 with copper pyrites. 



76. Calcareous spar, in six-sided prisms, accompanied by cop- 



per pyrites. 



77. Brown spar, massive, and in small rhomboids of yellowish- 



white colour. 



78. Brown spar, of rose-red colour, with some calcareous spar 



and pyrites. 



79. Leek-green quartz (prase), mixed with common qifartz. 



80. Yellow iron ochre, earthy. 



81. Massive barytes, of pearl-grey colour. 



82. Earthychlorites, of yellowish-green colour, with quartz. 



83. Leek-grey flint. 



84. Hornstone porphyry, of liver-brown colour, with felspar. 



85. Coarse quartz conglomerate. 



86—88. Common serpentine, of leek-green colour, with common 

 talc, from the Reek. 



89. Slaty talc, of leek- green colour, from ditto. 



90. Amianthus, forming narrow veins in common serpentine, 



from ditto. 



91. Asbestus, of pearl-grey colour, from ditto. 



Achill Island. 



92. Mica-slate, with white quartz, very thin, slaty, and silver- 



white mica. 



93. White stone, of pearl-grey colour. 



94 — 95. Amethyst quartz, of violet-blue colour in bacillar dis- 

 tinct concretions, with mica. 



96. Amethyst quartz, of amethyst-blue colour, cuneiform frag- 

 ments, with mica. 



97 — ^98. Amethyst quartz, of pale violet-blue, and amethyst- 

 blue colour, in isolated crystals, with some mica* 



99 — 104. Varieties of colours of amethyst quartz. 



105. Quartz conglomerate, of coarse granular construction. 



