L. F. Spath—Ammonites from Spitsbergen. 355 
Pavlow) in Bogoslowsky,! both of which, however, have a wider 
and less funnel-like umbilicus. The suture-line is characterized 
by four saddles between the siphonal line and the umbilical tubercle, 
the third of which (second lateral) is deeply bifid. 
The matrix of this specimen is a very dark and hard limestone ; 
but a fragmentary specimen preserved in a less calcareous rock, 
that partly is a true clay-ironstone, probably belongs to beds of the 
same age. This was collected at Fastness Camp, Cape Staratshin, 
and on account of its ‘association with the similarly preserved 
Rasenia, Virgatites, etc., the writer at first was inclined to put it 
into Gravesia, though the umbilical tubercles are not rounded, 
but sharp and comma-shaped, or into Cadoceras. The specimen, 
unfortunately, is fragmentary, and shows no trace of the 
suture-line, representing probably the body-chamber of a large 
form (D = 150 mm.), with the inner whorls poorly Proccnvcd in 
crystalline caleite. 
‘The specimen may be compared with 
Euryptychites cf. gravesiformis Pavlow, 
especially the smooth form figured on pl. x1, figs. 2c, 3,2 but it has 
a less depressed whorl section and thus a more rounded periphery. 
Polyptychites tschekanovskii Pavlow,? on the other hand, is too 
compressed and too involute, and still costate at a large diameter. 
P. senilis Koenen* and P. solidus Koenen® show a somewhat 
similar smooth and fat outer whorl. 
To judge by the two specimens mentioned, it would appear as 
though the Valanginian deposits were closely connected with the 
Purbeckian and Portlandian beds below, yielding Craspedites and 
Virgatites. The matrix of the specimens of Euryptychites and 
Craspedites is very similar and agrees with that of numerous 
Aucella of the group of A. terebratuloides. Other examples that 
appear to include the higher A. keyserlingi are ‘“‘ phosphatic ”’ 
On the other hand, the Ditrwpa sandstones, with Crioceras,that may 
be as high as Aptian,® clearly belong to another set of deposits. 
Stolley records clays, with concretions, and a very doubtful fragment 
of a Garmeria [=a Valanginian Platylenticeras ?| below a flaggy, 
grey sandstone of the Flysch facies, with interbedded clayey seams ; 
further, a very doubtful Polyptychites or Simbirskites from the 
Ditrupa sandstones. A change of facies between Cape Staratshin 
and Green Harbour on the one hand, and Advent Bay on the other, 
is, of course, possible, but the writer would refer all the Ammonites 
1“ Mat. z. Kenntn. d. Untercret. Amm. Fauna v. Ceatr. und N. Russl.’’: 
Mém. Com. Géol., N.s., Livr. 2, 1902, p. 140, pl. xvii, fig. 1. 
2 Loe. cit. (Sibir. Sept.), 1913, p. 37. 
3 Ib., p. 34, pl. viii. 
4 Loc. cae eles p- 50, pl. xx, figs. 1, 5. 
5 Ib., p. 52, pl. xxii, figs. ule 2, 
Stolley, Ub. d. Kreideform. und ihre Fossil. auf Spitzbergen’’: K. 
Svenska Vet.-Akad. Handl., vol. xlvii, No. 11, 1912, pp. 10-12. 
