ialontolngia ndita,

FAUNA OF K.ACHH (CUTCH). 201
his '.1l'1. transiens ' of fig. 6, if the comparison to Waagen's species is at all
apt, may belong to the same group. The Bihendula (Somaliland) example
figured by Prof. Stefanini is probably a Kimmeridgian Pseudinvoluticeras, Spath
(1925a, pp. 134, 141-2).
Horizon.-Lower Callovian, dimerus and diadematus zones.
Localities.-To the localities recorded by Waagen may be added the Habye
Hills where Mr. J. H. Smith collected some ten specimens. His Khera examples
come from beds 3-5' and a doubtful specimen, possibly of the var. aureus, but
more inflated, from his bed 6 (rehmanni zone). A still more uncertain and
badly preserved example, resembling K. lamellosus in shape, is from the 'Nucula
Flags ', East of Kaora on Patcham Island (Blake Colln. No. 215).
Genus :
DoLIKEPHALITES S. S. Buckman.
DoLIKEPHALITES SUBCOMPRESSUS (W aagen).
1875. Stephanoceras subcompressum Waagen, p. 139, pi. XXXIV, fig. 1.
1910. Macrocephalites subcompressus (Waagen) ; Uhlig, p. 265.
1910. Macrocephalites subcompressus (Waagen) ; Lemoine, p. 30.
1912. Macrocephalites keeuwensis beta (pars) J. Boehm, p. 161, pi. XXXVIII, fig.
2 (?).
non 1896. Macrocephalites subcompressus (Waagen) ; Noetling, p. 15, pi. IX, fig. 2.
non 1924. Macrocephalites (Eucycloceras ) subcompressus (Waagen) ; Spath, p. 21.
non 1926. Macrocephalites cf. subcompressus (Waagen) ; Kruizinga, p. 59, pi. VTII, fig. 4.
non 1928. Macrocephalites subcompressus (Waa.gen) ; Nickles, p. 34.
This well defined species does not differ essentially from D. typicus Blake
sp. {1905, p. 42, pl. Ill, figs. la, b) which perhaps may be distinguished by
its bundled primaries and a more acutely arched whorl-section, obviously quite
minor features where numbers of specimens are available. There are various
trnsitions between the two species, from Yorkshire as well as from Wurtemberg,
also passage forms to Macrocephalites compressus (Quenstedt) which differs
in its smaller umbilicus and less sharp and more lineate primary ribbing, resembling
that of M. triangularis. Since there is only one poorly preserved additional
specimen and the body-chamber fragment referred to below, the sutureline
remains unknown. It was not clearly visible on any of Waagen's examples.
One specimen of the fo m described below as Paryphoceras rugosum,
nov. from Col. Pottinger's (Geological Society) Collection, rather poorly preserved,
was at first taken to belong to the present species. Although there is considerabe
external likeness, the suture-line of the later form has ascending
auxiliaries and it may be safely presumed that in Dolikephalites subcompressus
the lobes are arranged more radially.
Those forms transitional from Macrocephalitidae to Cadoceras and Arcticoceras,
figured by Nikitin (1881, pl. X, fig. 44 and 1885, pl. Ill, figs. 15-17)
that Blake wrongly included in his M. typicus are not closely comparable to
any Kachh species. On the other hand, some of G. Boehm's (1912a, and l;)
figured examples of M. keeuwensis beta seem to be very close to if not identical
with Waagen's holotype, although the specimen which has been chosen