Arkell.1956.Jurassic..

INDONESIA
collected some of the fjfpical fauna of the Lochambel Beds of the Spiti
Shales: Haplophylloceras strigile (Blanford), Blanfotdiceras wallichi
(Gray) (in quantity), and local species of the Himalayan genera Uhligites,
Himalayites and Bochianites (Boehm, 1904, pis. i-vii). From the Sula
Islands have since been figured also two new species of Kossmatia
(Kruizinga, 1926, pp. 64-9, pis. xi, xii). These are more evolute than
typical Kossmatia and differently ribbed, but more nearly resemble some
Mexican species (K. zacatecana Burck.). A 'Lithacoceras" from East
Celebes (Wandel, 1936, pi. xvi, 1) is also a Tithonian form, perhaps
identical with Schliiter's Kossmatia from New Guinea.
KIMERIDGIAN
From the Sula Islands have been figured two Idoceras (Boehm, 1912,
pi. xliv; Kruizinga, 1926, pi. x, figs. 1, 2).
UPPER OXFORDIAN
From Wai Galo streambed on the south coast of Taliabu, Sula Islands,
Boehm in 1900 collected some 250 well-preserved ammonites associated
with crowds of belemnites and large coarse-ribbed Inocerami like those
from the Spiti Shales. Taking shelter from the sun in a native hut, he
noticed on the ground the holotype of Mayaites palmarum Boehm, which
had been a toy belonging to the local children. This find led him to search
the streambed and discover the classic Upper Oxfordian fauna of Wai
Galo. The ammonites occur in cementstone nodules weathering out of
shales, as in the Himalayan Spiti Shales (Boehm, 1907). As in the Dhosa
Oolite of Cutch, the fauna comprises mainly Perisphinctids associated
with Mayaitids, but the species are different. There are also Peltoceratoides
and Phylloceratids: Ptychophylloceras galoi (Boehm), Calliphylloceras
malayanum (Boehm), Holcophylloceras passati (Boehm), H. insulindae
(Boehm) and ? Partschiceras monsuni (Boehm).
The Perisphinctids, as has been pointed out (Arkell, 1939, Mon.
Am. Engl. Corallian Beds, p. lx), all or nearly all belong to the subgenus
Kranaosphinctes, which in England is early-Plicatilis Zone. The Wai
Galo forms are all new, and the fact that neither they nor the Mayaitids
are the same as those found in Cutch can be explained by supposing them
to be slightly earlier. If, as Boehm believed, they occur on the same
horizon as the large Peltoceratoides spp., a late-Cordatum Zone age is
suggested. The assemblage may perhaps be nearest in date to that from
Kwa Dikwaso in Tanganyika (p. 328), in which there are fragments of a
Perisphinctes indistinguishable from P. burui Boehm and similar Phylloceratids.
Similar Prograyiceras and Epimayaites occur near Mombasa.
The belemnites include Belemnopsis of the group of B. gerardi of the
Spiti Shales; Boehm (1907, p. 113) considered that these and the Inocerami
occurred slightly below the ammonites.
On the island of Buru, about 100 miles to the south-east, Upper
Oxfordian ammonites occur at many places. Near Mefa village they are
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