CONTENTS 
PAGE. 
List of Plates^ ... ... ... ... ... ... ... ... ... ... v 
Letter op Transmittal, by E. F. Pittman, A.R.S.M., Government Geologist and 
Under Secretary for Mines 
Preface ... 
ix 
M.EMOIR. 
II. — History of Eurydesma in Literature 
HI. — Form and Structure ... 
IV, — Affinities of Eurydesma, and Comparison with Other Genera 
V. — Geological Range and Distribution 
VI. — Description op Genus and Species ... 
41 
47 
64 
(!S 
70 
