PREFACE. Vll 



at Maraewhenua, in Otago. This is a local deposit, resting con- 

 formably on the Ototara limestone, and probably represents in 

 the district the " grey marls " of the above section. 



It is right to state that the author is not responsible for the 

 systematic characters of the families, or the index, which have 

 been prepared by my assistant^ Mr. T. W. Kirk. 



JAMES HECTOR, 



Geological Survey Office, Wellington, Director, 



l&th November, 1880. 



