122 Transactions of the Royal Society of South Africa. 
this stock. On the other hand, ' Pachy discus ' rotalinoides, Yabe,* from 
the Senonian Toyayo series, which may include any Senonian horizons 
below the Parapachydiscus-heds of the Hokkaido, and also, apparently, 
not a Jacobites, may possibly belong to the genus Menuites, described 
below. 
Parapachydiscus, Hyatt, 
was proposed for A. gollevillensis, d'Orbigny, which is very close to Parap. 
crishna and to Parap. egertoni, Forbes sp., the latter again a very near ally 
of the European Parap. neubergicus, Hauer sp., Parap. perfidus, Grossouvre 
sp., and Parap. jacquoti, Seunes sp. Kossmat's Indian " P. gollevillensis," f 
here renamed Parap. compressus, n.n., is different from the European type 
as figured by d'Orbigny and Seunes. J A specimen in the British Museum 
from the Baculite Limestone of Valognes, Manche (No. 50135), represents 
a new form (Parap. valognensis, nov.), with a whorl-thickness of 30 per cent., 
more closely cost ate and natter even than Grossouvre's fig. 9 of plate xxxi. 
Sharpe's A. gollevillensis § represents a more coarsely ornamented type, and 
the new name Parap. sharpei is here proposed for it. A series of Irish 
specimens in the British Museum includes a further new form, Parap. 
hibernicus, nov. (type No. C 15126), which differs from Parap. oldhami, 
Sharpe sp., in the coarseness of its ornament and from Parap. sharpei in 
having the whorl-section more rounded and the inner whorls continuously 
costate. Other varieties of Parap. oldhami are more finely costate than 
the type or Grossouvre's form,|| e.g. specimen No. 0 14830. 
A. soma, Forbes, which is not identical with the more inflated A. ganesa, 
Forbes, as Stoliczka and Kossmat had thought, belongs to this group of the 
genus Parapachydiscus, also P. haldemensis, Schliiter sp. and, probably, the 
compressed forms figured by Nowak on plate xl, but the group is not equiva- 
lent to Nowak's egertonianus-seiies. 
Apart from these compressed forms, which may tend to differentiate the 
ornamentation on the ventro-lateral edges, Parapachydiscus also includes 
many forms that develop inflated whorls and that are closely connected with 
the previous group by such forms as Parapachydiscus ganesa (Forbes), P. 
cricki (Kossmat), and P. co?nplexus (Meek). The numerous species grouping 
themselves round Parap. colligatus (Binkhorst) and P. deccanensis (Stoliczka) 
belong to this division of Parapachydiscus, including the three forms 
* " Notes on some Cret. Foss. from Anaga, etc.," Science Rep., Tohoku Imper. 
Univers., 2nd ser. (Geol.), iv, No. 1, 1915, p. 21, pi. ii, figs. 5 and 6. 
t " Unters. S. Ind. Kreideform.," iii, 1898, p. 97 (162), pi. xxi (xv), fig. 1. 
X " Contrib. Ceph. Cret. Super. France," Mem. Soc. Geol. France, Pal., No. 2, 1891, 
pi. 5, fig. 1 only. 
§ hoc. cit. (iii, 1857), p. 48, pi. xxii, fig. 2. 
|| Loc. cit., 1894, pi. xxii, fig. 1. 
