348 L. F. Spath—Ammonites from Spitsbergen. 
occurs in soft shales. The grey sandstones with a Lamellibranch 
fauna of Werfenian age from Axel Island,1 again, represent quite. 
a different facies. ; 
The difficulties encountered in studying the Lower Triassic forms, 
and due, chiefly, to the conflicting evidence of the various matrixes, 
and to the fact that some of the best-preserved examples were found 
loose, are met with again in dealing with the Middle Triassic 
specimens. 
Monophyllites sp. cf. spherophyllus, Hauer sp., 
Ptychites cf. trochleformis, Lindstrém sp., 
Ptychites ? sp. cf. tubetanus, Mojsisovics, 
? Gymnotoceras cf. laqueatus, Lindstrém sp. 
are referable to the Middle Trias (Anisian), though they are only 
preserved as impressions in a black shale that apparently corre- 
sponds with the “Thin Paper Shales” (Ds) of Professor Gregory’s 
section I. This shale is full of comminuted fragments of shells, 
and quite distinct from any other matrix, and it may be added that 
the two vertebral centra of Aphaneramma rostrata figured by Dr. A. 
Smith-Woodward have this matrix, whereas the skull is preserved 
in a hard nodular limestone reminiscent of the Posidonomya shales.? 
Stolley * recorded a Monophyllites from the Daonella beds, and 
considered these to be of Ladinian age, and the equivalent of the 
Wengen beds. He found Nathorstites, which characterizes Upper 
Triassic beds on Bear Island and in British Columbia, only a little 
higher, and thus would draw the boundary-line between the Middle 
and Upper Trias just above the Daonella beds. The large specimen 
of Monophyllites, mentioned above, resembles M. spherophyllus 
Hauer sp., but not M. wengensis Klipstein sp., and its association 
with Ptychites and Gymnotoceras suggests an Anisian age.* 
The specimen of Gymnotoceras, unfortunately, does not show the 
inner whorls,® and has a different matrix from all the other examples 
of Gymnotoceras in the collection. These occur with Lingula 
lindstromi J. Bohm,° and the other Ammonites given in the list 
1 Wittenburg, “Ub. Werfen. Sch. v. Spitzbergen’”’: Bull. Acad. Imp. Sci. 
St. Pétersb., ser. v1, 1912, pp. 947-8. 
* These specimens are from Sticky Keep, whereas the first three in the above 
list are from “‘ Bluff, above entrance to Flower Valley, over nodule bed’’, 
(Escarpment Shales of Professor Gregory’s Section II). The last (Gymnotoceras), 
which has a more slaty (worn) aspect, is from “‘ Sassen-Bay’’. 
3“ Z. Kenntn. d. Arkt. Trias.”’: N. Jb. f. Min., ete., vol. i, 1911, p. 117. 
4 Among 3,500 Bosnian Ammonites from the “‘ trinodosus-zone’’, recently 
named by the writer, the genera Ptychites and Monophyllites were represented 
by 640 and 314 specimens respectively, and, besides Arcestids, the dominant: 
element of the fauna. 
°> There is a certain resemblance in ornament to Protrachyceras sverdrupt 
Kittl (‘“ Die Trias-Fossil. vy. Heureka Sund’’: Report 2nd Norw. Arct. Exped- 
in the Fram, 1898-1902, No. 7, 1907, p. 39, pl. iii, fig. 9) also associated 
with a Daonella very similar to the Spitsbergen form. 
§ This author (loc. cit., p. 13) has a black, fine-grained limestone with this 
Lingula above the Lower Trias, and since the Lingula also occurs in slabs with 
Daonella he considers it of Ladinian (Middle Triassic) age. The form here 
