L. F. Spath—Ammonites from Spitsbergen. 303 
Danubites than to any other development, and it should be mentioned 
that Waagen’s D.? evolutus also is associated with Anasibirites. 
The young of some of the Spitsbergen forms also resemble the 
example figured by Diener! as Danubites nov. sp. ind., with evolute 
whorls, parabole-like costz, and constrictions like Diener’s Fig. 7a. 
Only the suture-line in this form of Danubites has the external 
lobe subdivided, whereas in the Spitsbergen group it is entire, 
like that of Ceratites minutus Diener non Waagen. The largest 
specimen of the group, a form very near to D.? evolutus Waagen, 
attains a diameter of 70 mm. 
Apart from over ninety specimens of this group of Danubites ? 
the collections include some more or less unidentifiable impressions 
of similar Ammonites in a black limestone, possibly from the 
“* Lower Lamellibranch zone”; also some in a softer, more brownish 
rock that may belong to the “ flags above the nodule bed ’’, with the 
large ribbed Pseudomonotis. It should be mentioned, however, 
that according to Stolley,? a very hard, splintery limestone occurs 
in large nodules above the Posidonomya shales. Stolley would 
include this in the Lower Muschelkalk, and considers Arctoceras 
lindstrome and A. costatum to belong to this bed. But the large 
specimen of A. lindstrémi, referred to above, from the “ lowest 
line of nodules in flags, 400-450 feet above camp, Mt. Marmier’’, 
has Posidonomya attached to the matrix, and the writer cannot 
separate it from the fauna of the Posidonomya nodules. The 
impressions referred to represent evolute more or less smooth shells, 
and their attribution to Danubites, of course, is quite uncertain. 
One specimen in a soft, dark shale resembles Meekoceras (Gyronites) 
nathorsti J. Bohm,* but the periphery is not shown.‘ 
Two specimens require special mention. They were discovered, 
accidentally, in what almost is a bone-bed, among portions of 
Labyrinthodonts and Ccelacanthid fish-remains, associated with 
Posidonomya, to judge by other specimens, and undoubtedly of the 
age of the Posidonomya shales. One of these specimens is a crushed 
and incomplete example of % Gyronites, comparable with G. 
aplanatum (White),* which also has been recorded from the Arctoceras 
bed by Stolley °; the other is a fragment, resembling ‘‘ Danubiies ”’ 
strongy Hyatt & Smith’ in its angular periphery, in ornament, 
and in evolution, but having the lateral folds a little closer. 
t Loe. cit., (1895, Ostsibir.), pl. i, fig. 7. 
> “ Zar Kenntn. d. Arkt. Trias’’: N. Jb., vol. i, 1911, p. 122. 
° “Ub. Trias Verstein. v. Bell-Sunde auf Spitzhbergen’’: Arkiv f. Zool., 
vol. viii, 1913, No. 2, p. 11, pl. i, figs. 17-19. 
* From Professor Gregory’s section I it will be seen that there are 600 feet 
of black shales and yellow flags (from which these Danubites may have come) 
between the undoubtedly Lower Triassic ‘‘ Nodule Bed ’’ (C,) and the probably 
Middle Triassic ‘‘ Earthy Limestone ’”’ (D,). 
> See Hyatt & Smith, loc. cit., 1905, p. 146, pl. xi. 
5 Loe. cit., 1911, p. 123, pl. ix, fig. 5. 
7 Loe. cit., 1905, p. 165, pl. ix, figs. 4-10. 
