300 L. F. Spath—Ammonites from Spitsbergen. 
or of P. (Claraia) aurita (Hauer) in Diener.t These slabs are labelled 
“Lower Lamellibranch zone”’, Trident, but a few are from Sticky 
Keep, and there called “ Upper Flags” (= Calcareous Flags, 
Bed above nodules ?). The presence of iron-pyrites in the latter, 
however, is reminiscent of the calcareous Arctoceras nodules in the 
Posidonomya shales, and the rock is hard, whereas the somewhat 
similarly weathering examples from the “ Upper Lamellibranch 
zone’, with a very large Pseudomonotis (Humicrotis), generally 
have a more earthy, brownish appearance. One Arctoceras 
impression, merely labelled “ Sassendal’’, may have come from 
this higher zone, but it is for future workers to investigate the 
range of Arctoceras in the shales and flags above the ‘“‘ Nodule bed”. 
A specimen of Arctoceras blomstrandi (Lindstrém) was attached 
to the umbilical impression of a very large shell, characterized by 
strong spiral ornament, on account of which the specimen is 
doubtfully referred to Flemingites. The longitudinal striation in 
this genus, however, is considerably finer than it is in the Spitsbergen 
example ; and the writer at one time was inclined to compare this 
specimen with certain Phlovoceras and other Nautiloidea. It seems 
most probable, however, that the example is a Flemingites, though 
spiral striation is also indicated in certain Arctoceras.2 Another 
specimen of Arctoceras and numerous Posidonomya mimer are to be 
observed in the same specimen. 
Two of the specimens referred to Goniodiscus are closely comparable 
with Meekoceras gracilitatis White,? but the periphery is slightly 
broader. Young examples of the same form, however, have the 
costation of Anasibirites, and are so nearly related to the forms 
here referred to that genus, to Prionites and to Tellerites, that the 
resemblance to the genus Meekoceras (with perfectly smooth inner 
whorls) can only be a case of convergence. The suture-line of this 
new species of Goniodiscus agrees with that of G. typus Waagen,” 
but the external saddle is a little wider in the Spitsbergen form. 
The latter also has a narrower and more sharply defined periphery. 
Another new species of Goniodiscus has coarse pleats at the middle 
of the side, near the end of the shell, and thus is transitional to 
1“ Triassic Faune of Kashmir’’: Mem. Geol. Surv. India, Pal. Indica, 
N.S., vol. v, Mem. No. 1, 1913, pl. v, fig. 9. 
* H.g. A. dbergi (Mojsisovics), loc. cit., p. 33, pl. vill, fig. 3.  Ceratites 
concentricus Oberg (“ Om Trias-Forst. fr. Spitsbergen ’’: K. Svenska Vet: Akad. 
Handl., vol. xiv, No. 14, 1877, p. 15, pl. ii, fig. 12) has concentric markings, 
but Mojsisovics (loc. cit., p. 8), who examined the type, states that they are 
the result of crushing. To judge by a number of specimens in the Reynolds 
Collection, this form is a crushed Ptychites of the Daonella Beds. 
3 In Hyatt & Smith, ‘The Triassic Ceph. Gen. of America’’: Prof. 
Paper No. 40, U.S. Geol. Surv., 1905, p. 148, pl. xii, figs. 7-9. Dr. C. T. 
Trechmann lately presented to the British Museum (Nat. Hist.) a very fine 
series of Triassic Ammonites from California, Nevada, and Idaho, U.S.A., 
including many topo-types of Hyatt & Smith’s species. 
4 “Salt Range Fossils: II. Fossils from the Ceratite Formation’’: Mem. 
Geol. Surv. India, Pal. Indica, ser. x11, 1895, p. 128, pl. ix, figs. 7-10. 
