Acknowledgments

I wish to thank Drs. J. Marwick and C. A. Fleming for criticising the original draft of this paper and for their willing assistance and encouragement. I also wish to thank Dr. Fleming for providing the lists of macrofossils and Mr. N. de B. Hornibrook for the lists of Foraminifera, and Dr. J. A. Jeletsky for plaster casts of Canadian Inoceramus specimens. In the field I have been assisted by many geologists all of whom I wish to thank. In particular I am grateful to Mr. H. E. Fyfe for showing me the important Cretaceous sections in the Kaikoura Subdivision.

The original draft of this paper, written in 1956 while the writer was working for the New Zealand Geological Survey, N.Z. Department of Scientific and Industrial Research, has been considerably amplified while at the Victoria University of Wellington, information gained during 1957 and 1958 being added. I have to thank the directors of the British Petroleum Company of England for permission to include a description of new fossil localities near Gisborne and Mr. J. Bradley, of Wellington University, and Mr. I. G. Speden, of the New Zealand Geological Survey for corrections to the final draft. I have also to thank Mr. R. W. Willett, Director of the New Zealand Geological Survey, for arranging the drafting of the illustrations.