On Jurassic and Cretaceous fossils from North-East Greenland. -IH'A 



mined to their species. In form most of them show a considerable 

 resemblance to N. plicata Mi:. (Goldfuss: Petrefacta Germaniae. 

 III. p. 119; PI. 109, fig. 15) from Lindner Berg in Hanover, but the 

 transverse folds of the last whorl seem to be wanting. — One of 

 the two specimens from "Kloft I" is considerably smaller than the 

 others and probably belongs to a different, more slender species. 



59. Turritella sp. 

 PI. XXXV, fig. 7. 



From "Kloft II" on Store Koldewey Island there is a fragment 

 of a Turritella, consisting of ca. 5, extremely well-preserved whorls. 

 It probably belongs to a hitherto underscribed species. 



Very elongate-turreted with numerous, flat whorls, separated by 

 little obvious sutures. Uppermost on the younger whorls present a 

 very narrow and quite faint excavated band, on which there is a 

 pair of quite fine, raised spirals. The rest of the shell covered with 

 numerous, rounded spirals of variable breadth and with somewhat 

 variable interspaces; the last usually less than, sometimes equal to 

 the breadth of the spirals. Lines of growth fine, in an even curve. 



On the second-last whorl present, with a diameter of 8 mm, the 

 number of spirals is 9. 



The whole appearance greatly resembles that of a Nerinea, but 

 there is no trace of the internal folds characteristic of this genus. 



A second, less well-preserved specimen from "Kloft I" on Store 

 Koldewey Island probably belongs to this species. 



In the boulder containing Aucella mosqnensis from Harefjadd at 

 Danmarks Havn a stump was found of a quite indeterminable 

 Turritella species. 



till. Ghemnitzia undulata TuiXBERG sp. 



1881. Eulima undulata Tullbehg, Aucella-Schichten Novaja Semljas. p. 10: PI. 2, 



tigs. 26—27. 



Short turreted with slightly arched whorls. These separated by 

 deep sutures and — in the case of the older ones — covered with 

 fairly coarse, curving, rounded transverse ribs; the younger whorls 

 on the other hand smoother, without regular transverse ribs, but 

 with coarse and fine, curving lines of growth. Further, numerous 

 very fine spirals. The aperture probably oviform, with a pointed 

 angle above. 



Length ca. 8 mm, thickness ca. 4 mm. 



Although numerous specimens of the species are present, I have 

 not seen a single complete shell. According to Tullbehg's descrip- 

 tion there should be transverse ribs on all the whorls; his figures 



