On the Senonian Ammonite Fauna of Pondoland. 
127 
Parapuzosia has the course of the radial line and the constrictions of 
the strongly projected subplanulata-type different from the straight orna- 
mentation of the Campanian 
Kitchinites, gen. nov. 
(genotype : Holcodiscus pondicherryanus, Kossmat, loc. cit., 1897, p. 40 
(147), pi. vi (xvii), fig. 6 ; British Museum, Geol. Soc. Coll.). This also 
includes K. japonicus, n.n. { = Desmoceras gaudama, Yokoyama non Forbes), 
and a South American form before the writer, near to K. darwini (Philippi 
in Steinmann). The genus is very close to the stock from which also 
originated Kossmaticeratinae (namely, Kossmaticeras, Madrasites, Gun- 
narites, Jacobites, Pseudokossmaticeras, Brahmaites), but not the isolated 
Holcodiscoides, which is a much earlier offshoot from Puzosinae. ' Puzosia ' 
ishakawai, Jimbo, is probably a young Kitchinites, hardly distinguishable 
from the ancestral Parapuzosia. 
That the genera Parapuzosia and Kitchinites, which continue the true 
Puzosid type into the Senonian, are not derivatives of the Cenomanian 
A. denisonianus, is clear ; for the latter already develops a pachy discoid 
stage, and 
Pachydesmoceras, gen. nov. 
(type : A. denisonianus (Stoliczka), Kossmat, loc. cit., 1898, p. 121 (186), 
pi. xv, figs, ba, b), is here proposed for this form. It is probably closely 
related to the contemporary Puzosia of the typical planulata-giowp rather 
than to the Aptian Uhligella, and the Cenomanian Holcodiscoides is a close 
ally. But in the Turonian, true Puzosids still persist and give rise to at 
least two developments, one specialising in size (Austiniceras) and the 
other in crenulation of the periphery (Tragodesmoceras). The genus 
Austiniceras, gen. nov. 
(genotype : A. austeni, Sharpe, loc. cit., ii, 1855, p. 28, pi. xii, figs, la and b, 
non 2, B.M., No. C 3382), has inner whorls of the type of A. dibleyi, n.n.( = 
A. austeni, Sharpe, p.p. pi. xii, fig. 2 only, holotype, B.M., No. C 13912, 
Dibley Coll. from Holaster subglobosus zone), which is more involute than the 
type species, and on the outer whorl develops costation of a different type, 
foreshadowing that of the later Parapuzosia. The gigantic A. mobergi, 
A. poctai, Grossouvre, and A. montis-albi, Laube and Bruder, belong to this 
genus Austiniceras. 
Tragodesmoceras, gen. nov. 
(genotype : Desmoceras clypealoides, Leonhard, " D. Fauna d. Kreidef. i. 
Oberschles.," Pal., vol. 44 (1897), p. 57, pi. vi, fig. 2), is proposed for a group 
