142 



INDEX. 



regions in relation to vegetable 



growth, 116. 



Wisembach (Vosges), rocks of, 51. 

 Wollastonite occurs in altered rocks. 



7, 61. 



X. 



Xera (and Thalassa) in the Permian 



period, 99-106. 

 Xerothermal rocks, 35, 71. 



Y. 



Young, John (Hunterian Museum of 

 Glasgow), referred to, 70. 



Z. 



Zermatt, peridote of, 61, 62. 

 Zircon occurs in methylosed rocks, 7. 

 Zirkel, Prof. F., on rounded crystal- 

 loids in hemithrene, xxvi. 



, on "JEozoon," xxix. 



Zittel opposes "Eozoon" xlix. 



Printed by TAYLOR and FBANCIS, Red Lion Court, Fleet Street. 



