120 Frof. A. E. Nordenskiold — Geology of Spitzbergen. 



c. Advent Bay. — The shore rocks here consist for the most part 

 of an aluminous limestone, and a black slate containing Jurassic 

 fossils, but only in limited number, and generally in a bad state of 

 preservation. Among these fossils may be specially named a small 

 fossil starfish (sjostjerna), of which a couple of very beautiful 

 specimens were obtained. The strata here lie horizontally, and 

 evidently occupy a very large extent of country both towards Coal 

 Bay and Sassen Bay. 



d. Sassen Bay. — On the south shore close to the entrance of the 

 fiord. The upper part of the mountain consists here probably of 

 Miocene strata, the foot of Jurassic strata, which at the shore lie 

 nearly horizontally, and consist of black slates and grey limestone, 

 rich in ill-preserved fossils, among which Lindstrom names Aucella 

 Mosquensis, Cyprina inconspicua and Ammonites tripUcatus. 



No sharp boundary between the two divisions into which, on the 

 ground of observations at Cape Agardh, I have divided the Jurassic 

 strata in Spitzbergen, can be observed at these places, inasmuch as 

 the slates are often intersected by seams of limestone and infused with 

 colossal blach round nodules, which, however, are distinguishable 

 from the nodules of the Triassic formation by their less regular form 

 and darker colour. 



These nodules occurring in the Jurassic strata (I.), and the Sphsero- 

 siderite from the second division at Agardh's mountain (II.), have 

 been analyzed by Mr. Gr. Lindstrom, who found them to contain : 



Carbonate of lime 



Carbonate of magnesia 



Carbonate of protoxide of iron , 



Phosphate of lime 



Sulphate of lime 



Alumina 



Oxide of iron and a little alumina ... 1-35 



Chlorine trace ... trace 



Incombustible residue insoluble in acids ... 39-81 ... 21-07 

 Bituminous matter and moisture 3*12 ... 1-90 



I. 



II. 



48-52 .. 



. 6-95 



2-32 .. 



. 15-36 



4-48 . 



. 51-30 



0-39 .. 



. 1-85 



trace . 



. 0-22 



1-36 .. 





100-00 100-00 



The fossils are ill preserved, broken and worn asunder, on which 

 account their determination has been attended with many difficulties. 

 Dr. Lindstrom, in his previously quoted work, enumerates the follow- 

 ing species : 



1. Amynonites tripUcatus^ Sow. 



2. Cyprina inconspicua, Lindstrom 



3. Gardium concinnum, v. Buch. 



4. Solenomya Torelli, Lindstrom. 



5. Leda nuda, Keys. 



6. Inoceramus revelatus, Keys. 



7. Aucella Mosquensis, v. Buch. 



8. Pecten demissus, Beau. 



9. Fecten validus, Lindstrom. 

 10. Ophiura Gumoelii, Lindstrom. 



In addition there is a number of species, not distinguishable with 

 certainty, of Fishes, Serpula, Belemnites, Dentalium, Panopjoea, Tellina, 

 Cytherea, Area, Nucula, Avicula, etc. 



Of these fossils, 1, 3, 7, 8, occur at Moscow, principally in Traut- 

 schold's " Mittlere Etage ; " 1, 3, 5, 6, in the Jurassic strata at Pet- 

 schora. 



