Arkell.1956.Jurassic..

AZERBAIJAN 367
Hecticoceras (Brightia) aff. metomphalum (Bonarelli) (Borne, pi. i, fig. 6)
Hecticoceras (Lunuloceras) sp. (Ludwigia lunula teste Borne)
Hecticoceras (Putealiceras) cf. punctatum (Stahl)
Hecticoceras (Putealiceras) cf. paulowi de Tsyt. (Borne, pi. ii, fig. 6)
Reineckeia straussi (Weithofer)
Reineckeia weithoferi R. Douville (Weithofer, pi. ii, fig. 5)
Perisphinctes (Grossouvria) curvicosta (Oppel?) Neumayr
Perisphinctes (Grossouvria) tetrameres (Weithofer)
Perisphinctes (Grossouvria) cyrus Borne (pi. i, fig. 2, and pi. iv, fig. 12)
Perisphinctes (Indosphinctes) xerxes Borne
Perisphinctes (Choffatia) balinensis Neumayr
Von dem Borne also believed he had recognized Perisphinctes paneaticus
Noetling (1887, pi. iv, fig. 5), an Oxfordian species from Mount Hermon,
but whereas that seems to be an Alligaticeras, Borne's figure (1891, pi. ii,
fig. 8) shows a finely-ribbed Grossouvria.
LOWER CALLOVIAN ?
Von dem Borne (1891, p. 10) recorded a fragment of large coarselyribbed
Macrocephalites and a problematic form 'Stephanoceras stenostoma'
Borne (not figured) both from a different locality from the rest of the
Callovian forms. Both might perhaps be Erymnoceras, but a representative
of the Lower Callovian is possible.
UPPER TOARCIAN (Jurense Zone)
Weithofer recognized and figured two fragments of Harpoceratids
which he rightly assigned to the group of Dumortieria radians (Reinecke).
Von dem Borne renamed them 'Harpoceras' atropatenes Borne and mediae
Borne, refiguring the latter and adding a third species kapautense Borne.
H. Douville (1904, p. 201) did not consider atropatenes specifically distinct
from Grammoceras (Pseudogrammoceras) fallaciosum Bayle. In any case,
they give a firm dating to the uppermost Toarcian, which is a horizon
conspicuous in the Caucasus and the Elburz.
The geological relations of these fossiliferous beds are not known.
THE ELBURZ MOUNTAINS
From the region of Lake Urmia the great arc of folded mountains
constituting the Elburz sweeps round the southern shore of the Caspian
Sea and continues eastwards in a sigmoid curve through northern
Khorassan to join up with the ranges of the Persian-Afghanistan frontier
beyond Meshed. South of the Caspian the arc is convex to the south,
farther east it is convex to the north. Jurassic outcrops are more or less
continuous throughout the range and, except that the Lias up to the
Toarcian is generally developed in a carbonaceous 'continental' facies as
in the Caucasus, the series is probably complete. The great thickness
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