Arkell.1956.Jurassic..

INDONESIA
attributions for Boehm's Taliabu Macrocephalitids (Boehm, 1912, plates
xxxv-xliv) are scattered through nearly 100 pages of specific descriptions
and lengthy discussions of Indian ammonites in Spath's Cutch revision
{1928, pp. 163-252):—
Dolikephalites subcompressus ? (Waagen), Spath 1928, p. 201, for Boehm's
pi. xxxviii, fig. 2.
Kamptokephalites beta-gamma (Boehm), Spath, p. 198, for Boehm's pi.
xii, fig. 5.
Kamptokephalites subkamptus Spath, p. 174, for Boehm's pi. xii, figs.
1a, b only.
Indocephalites apretus Spath, 1928, p. 190, for Boehm's pi. xxxix, fig. 3.
Idiocycloceras bifurcatum (Boehm), Spath, p. 206, for Boehm's pi. xxxix,
fig. 1 (= Kruizinga, 1926, pi. viii, figs. 1-3).
Eucycloceras intermedium Spath, p. 210, for Boehm's pi. xxxviii, fig. 3.
Kamptokephalites etheridgei Spath, 1928, pi. xxxii, fig. 3 (New Guinea),
covering Macrocephalites waageni Kruizinga, 1926, pi. ix, figs. 1, 2,
non Uhlig, from the Sula Islands.
From these determinations it emerges that both Macrocephalus and
Rehmanni Zones of the Cutch Callovian are represented in the Sula
Islands. Macrocephalites s.s. as now understood seems to be represented
by Boehm's pi. xxxvi, fig. 1 and perhaps pi. xliv, fig. 1.
The presence of Lower Callovian on Rotti is attested by a ? Dolikephalites
figured by Boehm, 1908, pi. xii, fig. 2.
BATHONIAN
The occurrence of both Lower and Upper or Middle Bathonian (or all
three) at Keeuw in the Sula Islands is shown by three ammonites figured
by Boehm (1912) amongst his Lower Callovian Macrocephalitids.
Sphaeroceras sofanum Boehm (p. 150, pi. xxxv, fig. 2) is a typical Bullatimorphites,
like the three species with which he compared it, all of which
are Bathonian. Sphaeroceras godohense Boehm (p. 151, pi. xxxv, fig. 1)
appears to be a Rugiferites like those from the Subcontractus Zone of
England; but the apertural region is missing, and if the complete ammonite
identified with Boehm's species by Kruizinga (1926, pi. xiv, figs. 2, 3)
is the same, appearances are deceptive and S. godohense is nearer to the
Bajocian Chondroceras. Lastly, at least one of the ammonites figured by
Boehm as Oppelia fusca (pi. xxxiii, fig. 3) is the true O. fallax (Gueranger),
of the Lower Bathonian. I have no hesitation in confirming this identification
since receiving a collection of this species (in 1951) from Persia
(see p. 371). Lissoceras occurs on Babar (Wanner, 1931, p. 588).
BAJOCIAN
Some other Keeuw ammonites figured by Boehm (1912) indicate the
presence of the Bajocian. The fine Cadomites (pi. xxxiv, fig. 5), it can
hardly be doubted, was correctly identified as an Upper Bajocian species by
Boehm, although Cadomites ranges up into at least the Middle Bathonian
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