525 



y.B. 94. Syenite . . . 



103. Trachyte . 



104. Trap Tuff . 



Exchanged. 



Y.B. 140. Augite-Andesite 



148. Augite Granite . 



141. Basalt . . , . 



142. Basalt: Markle type . 



143. Basalt, with tachylite 



edges 



144. Basalt, vesicular 



145. Chiastolite Slate 



146. Dolerite : Dunsaple 



type 



147. Gabbro 



149. Granite-Porphyry 



150. Granite-Porphyry 

 163. Granite-Porphyry 



151. Glaucophane-epidote- 



schist 



152. Gneissic-Hypersthene- 



Gabbro 



148. Granophyre 



153. Hornblende -Andesite 



154. Hornblende- Dolerite . 



155. Hornblende, Quartz- 



Porphyrite 



156. Kersantite 



157. Kenyte, with vitreous 



oase 



158. Limestone, metamor- 



phosed . 



159. Mica-Schist 



160. Mica-Schist with Peg- 



matite . 

 162. Mica (Muscovite): 

 Biaxial interference 

 figure. 



161. Minette . 



Markfield, Leicester. 

 Nth. Berwick Law. 

 Arthur's Seat, Edinburgh. 



Cleveland Dj^ke, Yorks. 

 Mull, N.B. 

 Faroe Islands. 

 Lairs Low, IST.B. 



Castle Craigs, N.B. 

 Cape Boyds, Antarctic. 

 Bhine. 



King's Pk., Edinburgh. 

 Cunsfell, Cumberland. 

 Dufton Pike, Westmorland. 

 Trevor Quarry, Carnarvon. 

 Threlkeld, Cumberland. 



Llanfair P. G., Anglesea. 



Bellinzona Soizzero, Italy. 

 Mull, N.B. 



Bolvershahn, Germany. 

 Mancetter, Warwick. 



Quenast, Belgium. 

 Willischthal 



Cape Royds, Antarctic. 



lona, N.B. 



Boseg Thai, Switzerland. 



Cape Royds, Antarctic. 



Swindale Beck, Westmorland. 



