44(1 J. P. J IUvn. 



numerous casts and imprints hardly determinable to genus and spe- 

 cies, which were referred by Toula to the genera Lucina, Cijthereu 

 and Venus K Th. Fdchs, who later undertook a renewed investigation 

 of the material, added here two other genera, namely Astarle and 

 Pecten 3 . He also came to the result, that the fauna might probably 

 be Miocene. As we shall see later, this determination of the age is 

 incorrect, as the Danmark Expedition discovered fossils in the 

 yellowish, sometimes brick-red sandstone on Hochstetter's Foreland, 

 which quite definitely belong to the youngest Jurassic (Malm). 



The sedimentary deposits discovered by the 2nd German North 

 Pole Expedition at Flache Bay were also referred by Toula and Li:\x 

 to the Tertiary system. Nathohst, who also investigated this part of 

 East Greenland on his 1899 expedition, expressed some doubts as to 

 the correctness of this determination of the age;, various conditions 

 seeming to him to suggest the Jurassic — at least for a portion of 

 the sediments. Future investigations must decide this question. 



I have thus given quite a brief summary of what has hitherto 

 been known regarding the mesozoic deposits with marine fauna in 

 East Greenland; in the sequel I shall discuss the results of my in- 

 vestigation of the material brought home [by the Danmark Expedition 

 from these deposits. 



III. The marine, mesozoic deposits investigated 

 by the Danmark Expedition. 



1. Stratigraphical conditions. 



As already mentioned above, the Danmark Expedition found 

 Jurassic deposits on Hochstetter's Foreland, deposits that had hitherto 

 been erroneously referred to the Tertiary system. The principal col- 

 lections of mesozoic, marine fossils were made, however, on Store 

 Koldewey Island; not only were fossiliferous Jurassic deposits of 

 somewhat different age found there, but also — at one point — 

 interesting Neocomian deposits with a fauna which is very nearly 

 related to that on the east side of Kulm Island. Mesozoic fossils were 

 also found further north, in the district round Danmarks Havn, but 

 only in boulders. These boulders are referable partly to the youngest 

 Jurassic, partly to the oldest Cretaceous. 



1 Toula: 1. c, p. 477 and 495. 



- Th. Fuc.hs: Ueber die wahrend der schwedischen geologischen Expedition nach 

 Spitzbergen im Jahre 1882 gesammelten Tertiarconchylien , p. 5. — Bihang till 

 K. Svenska Vet.-Akad.'s Handlingar, Bd. 8. Stockholm 1883. 



:! Toula: 1. c, p. 477. 

 Lknz: I. c., p. 486. 



