126 
Transactions of the Royal Society of South Africa. 
Parapachy discus. P. amarus, Paulcke sp., is a transitional species from 
Kitchinites or Kossmaticeras. 
The young of ' Pachydiscus ' conduciensis, Choffat,* somewhat resembles 
P. umtafunensis, and Choffat's gigantic species may have to be considered 
as a special offshoot of this group of Parapachy discus. The new genus 
Lytodiscoides, gen. nov. 
(genotype : Pachydiscus conduciensis, Choffat, loc. cit., p. 18, pis. ii-v and 
frontispiece), is proposed for this development. The ornamentation here, 
though also increasing in strength, is of quite a special type. 
As regards the sub-family Kossmaticeratince, the genus Madrasites, Kilian 
and Reboul, is a descendant of the true Kossmaticeras (theobaldianus-giou])), 
and Gunnarites and Grossouvrites are closely allied genera, but Seymourites 
and Grahamites are still doubtful, and at any rate cannot be regarded as 
subgenera of Kossmaticeras. A late Campanian type that, unlike Madrasites, 
does not tend to involution, but leads, via forms of the group of A. brandti 
and A. ditreri, Redtenbacher, to Brahmaites, requires a new name, and 
Pseudokossmaticeras, gen. nov. 
(genotype : A. pacifcus, Stoliczka, loc. cit., 1865, p. 160, pi. lxxvii, fig. 9), 
is here proposed. Most of the European " Kossmaticeras " belong to this 
stock. 
Sub-family PUZOSINAE. 
Nowak introduced his genus Parapuzosia tor Ammonites of the 'denisoni'- 
type, and he erroneously thought that they could be traced from the 
Cenomanian to the uppermost Cretaceous. It might, of course, be held 
that A. denisonianus, Stoliczka, is thus the genotype ; but this species is 
not cogeneric with Parapuzosia daubreei (Grossouvre), the only species 
described and figured by Nowak, so that the writer selected this Santonian 
form as the type of the genus Parapuzosia, which also should include 
Parap. leptophylla and P. (?) icenica, Sharpe sp., P. corbarica, Grossouvre 
sp., P. gaudama, Forbes sp., P. indopacifca, Kossmat sp. and P. stobaei, 
Nilsson sp., the latter possibly transitional to Parapachy 'discus. j* The 
unornamented A. griffithii, Sharpe, may be close to the last species, as 
de Grossouvre thought ; for Sharpe's drawing of its suture-line is 
obviously quite sketchy. 
* " Contrib. Connaiss. Geol. Col. Portug. cTAfr. : 1, Le Cret. de Conducia," Comm. 
Serv. Geol. Poitug., 1903, p. 18, pis. ii-v and frontispiece. 
f This form was considered to be a Parapachydiscus in Cret. Ceph. fr. Zululand, 1921, 
p. 225. 
