L. F. Spath—Ammonites from Spitsbergen. 349 
below, in a limestone which is very compact and black when fresh, 
but brownish, softer, and more flaggy when weathered, and which 
may correspond with the black, fine-grained limestone referred to 
by J. Bohm. The forms of these black limestones and calcareous 
flags (as distinguished from the above shales) are :— 
Gymnotoceras laqueatum (Lindstrém), common. 
— falcatum (Mojsisovics). 
ah geminatum (Mojsisovics), common. 
Danubites ? sp. 
Tropigastrites ? cf. polygyratus Smith. 
Monophyllites ct. spetsbergensis (Oberg). 
The evidence, however, is by no means satisfactory ; for very 
similar black limestones, weathering to various lighter colours, 
occur in nodules in the Lower Trias, and it should be mentioned that 
Gymnotoceras falcatum is labelled [by error ?]** Nodule-bed, Trident’, 
and one specimen of G. cf. laqueatum comes from “ EK basement bed 
of Trident’. The latter has the matrix of some thirty specimens 
of G. geminatum (Mojsisovics), comparable with the two crushed 
specimens figured by Mojsisovics? from the black calcareous shales 
of the Hyperite Hat. It agrees with the “‘ Calcareous Flags above 
nodules’, referred to above, characterized by a Pseudomonotis, 
but it may only represent a more weathered condition of the black 
crystalline limestone that contained Lingula, Monophyllites, and 
[doubtfully] Gymnotoceras falcatum. On the other hand, a similar 
Pseudomonotis occurs in the Ptychites-beds.3 3 
Two quite indeterminable impressions of Ammonites are labelle 
“Phosphate Series, near Botanists’ Camp, de Geer Valley Delta, 
Sassen Bay’’, and probably came from one of the Oozy Mound Beds 
(E) of Professor Gregory’s section I. Phosphatic shales are 
mentioned by Nathorst,* as occurring both in the Lower and, more 
frequently, in the Middle Trias (Daonella shales), but the more 
involute impression (unfortunately crushed quite flat) may even be 
a Nathorstites, and thus indicate a Carnian horizon. 
The only fragment of an Ammonite, actually associated in the 
same slab with Daonella, unfortunately is indeterminable. On the 
39 
referred to ZL. lindstrémi, like Gymnotoceras falcatum and Monophyllites cf. 
spetsbergensis, are preserved in a black limestone that is characterized by the 
brownish calcite, replacing the shells; but Arctoceras may be similarly 
preserved. 
1 This small form is characterized by three saddles, like Himalayan species 
of the group of M. suessi, figured by Diener (1895, pl. xxxi), but in shape 
more like J. nara Diener or M. spetsbergensis (Oberg). 
2 Loc. cit,, 1886, p. 49, pl. ix, figs. 13, 14 only. Many examples of this form 
from ‘‘ West of Fortress’’, near Cape Staratshin, and from Trias Point, North 
Side of Van Keulen’s Bay, Bell Sound, are in Mr. Reynolds’s Collection. 
8 After seeing Professor Gregory’s section I, the writer would put this 
Gymnotoceras fauna into D, (“‘ Earthy Limestone’’). 
4 “ Beitr. z. Geol. d. Baren- Insel, Spitzb. und d. Kén. Karl Landes”: 
Bull. Geol. Inst. Univ. Upsala, vol. x, 1910-11, Nos. 19 and 20, p. 352. 
