On Jurassic and Cretaceous fossils from North-East Greenland. 453 



IV. Description of the fossils. 



1. Pentagonaster (?) sp. 

 A single marginal plate oi" an Asteroid, which seems to helong 

 to the genus Pentagonaster Linch, was found in one oi' the tree-lying 

 stones at "4. Sænkning" on Store Koldew^ey Island. The material is 

 too imperfect for a closer determination. 



2. Serpula cf. convoluta Goldfuss. 

 1831. Serpnla convoluta Goldt uss. Petref. Germ., Vol. I, p. 228; PI. 67, fig. 14. 



Cylindrical, thick- walled, spirally twisted tube with transverse 

 wrinkles on surface; only the older whorls attached to the under- 

 stratum . 



Of the two available specimens, one is twisted to the right, the 

 other to the left. They are distinguished from Goldfuss' species, 

 which was found in the Dogger, by the absence of a sharply marked 

 spiral ridge; further, they seem to be considerably thicker in the 

 shell, so that they possibly cannot be referred to this species, \\ith 

 which however they show fairly great agreement. 



Distribution. North-East Greenland: Store Koldewey Island, 

 lying loose on the tenting ground, 2 — 6. June 1907 (1 spec); Store 

 Koldewey Island, exact locality not stated (1 spec). 



3. Serpula sp. 



Attached to a specimen of Amberleija groenlandica n. sp. in a 

 loose-lying stone, from the locality do^yn from "Trækpasset" on Store 

 Koldewey Island, was the hind part of a Serpula tube triangular in 

 section. Closer determination w^as impossible. 



4. Rhynchonella sp. 



Two valves belonging to one or other species of the genus 

 Rhynchonella are so defective, that even an approximately certain 

 determination of the species is impossible. They have few, but well- 

 marked radial folds and a narrow and deep sinus. Both were found 

 at "Kløft I" on Store Koldewey Island. 



5. Terebratula sp. 



Some specimens of a fairly large Terebratula species could un- 

 fortunately not be prepared entirely free from the rock, so that the 

 species could not be determined. They all come from "Kløft I" on 

 Store Koldewey Island. 



XLV. ;^3 



