171 



tude. At Munich, Herr Geheimrath К. A. v. Zittel received me, 

 as on former occasions with every possible expression of kind- 

 ness and goodwill. He placed a seat in the Palæontologicai 

 Institute at my disposal and permitted me to make use of the 

 very valuable palæontological collection for purposes of com- 

 parison. I tender to him now my heartfelt thanks for all the 

 assistance he, in many ways, afforded to me. Even then my 

 labours would hardly have been crowned with such satisfactory 

 results, had not Herr Professor Dr. J. F. Pompeckj proffered me' 

 such ready assistance in my researches. His very wide experi- 

 ence of the fossils belonging to the Jurassic formations of 

 Arctic regions has been of the greatest assistance to me, in 

 helping to determine the more obscure fragments, and I beg 

 here to express my gratitude to him for his kindly help. 



The conclusions I arrived at and the descriptions of the 

 various species that could be identified, are contained in the 

 following pages. 



