PREFACE. 



During his stay on Northbrook Island in the Franz Josef Land Archipe- 

 lago — from June 17th until August 7th 1896 — Professor Fridtjof Nansen 

 collected a large number of rocks and fossils. Part of this collection com- 

 prising Jurassic marine fossils, was submitted to me for examination. The 

 results of the investigation of this valuable material are described in the fol- 

 lowing pages. 



Munich, September 1898. 



J. F. POMPECKJ. 



