488 J- P- J- f^AVN. 



the keel, so that this is bounded on both sides by a smooth band. 



The keel is well-developed and very finely dentated; the number of 



teeth is far in excess of that of the ribs. 

 The suture-line is fairly strongly den- 

 tated; the first lateral lobe is deep and 

 ends in 3 points, the middle one being 



(/ much longer than the others; the second 



lateral lobe is verj^ short, 



A single fragment from "Kløft I" 



Fig. 3. The suture-line of С((Г(/)осеп(8 •,! .i i • • i 



Nathorsii LnGHN. sp. Height oi the »grces With the abovc specmieus m regard 



whorl 21 mm. to the sculpturc; on the other hand, the 



suture-line is perhaps somewhat difTerent. 



A small, less well-preserved specimen of a Cardioceras from 

 "4. Sænkning" may perhai)s be referred to this species, owing to the 

 densely placed ribs and the fine dentation of the keel. 



Distribution. North -East Greenland: "Kløft I" on Store 

 Koldewey (1 spec.?). "Kløft П" on the same island (3 spec). In 

 loose-lying boulder at "4. Sænkning" likewise on Store Koldewey 

 Island (1 spec. ?). 



Spitzbergen: Sé({uanian-Kimmeridgiaii. 



()7. Cardioceras sp. 

 PI. XXXV, fig 11. 



A fairly complete, i)ut not quite well-preserved imprint of an 

 Ammonite must be referred to one or other species of the genus 

 Cardioceras. It was found at "Kløft I" on Store Koldewey Island 

 along with C. alternans. From this it is distinguished especially by 

 the fact, that the ril)s on the youngest part of the shell are very 

 much raised on the middle of the side and form here a marked row 

 of nodes; a similar row, but with smaller nodes, occurs on the 

 umbilical edge; uppermost on the side the ribs are likewise strongly 

 developed and inclined forwards. There seems to be a considerable 

 resemblance with the form, which Ilovaïsky (1. c, p. 272, PI. 11, fig. 6) 

 describes and figures under the name of C. cf. altenums Buch and 

 considers as a transition form between a variety of C. cordatum Sow. 

 and C. alternans. But in this form the ribs are somewhat denser 

 and their uppermost part (nearest the keel) not so sharply bent. 

 The dentation of the keel, on the other hand, seems to be quite 

 similar. 



()8. Quenstedtoceras (?) s[). 

 PI. XXXVI, fig. 4. 



A small fragmenl of an Ammonite belongs perhaps to a species 

 of this genus. It was found in the free-lying brownish sandstone 



