128 Transactions of the Royal Society of South Africa. 
of desmoceratid forms sometimes included in Muniericeras. This was 
referred to by the writer on a previous occasion,* and forms the lineage 
leading from the Turonian Tr. clypealoides (Leonhard), Tr. mulleri (Gross- 
ouvre), and Tr. hemensis (Schluter) to the Lower Senonian Tr. clypeale 
(Schliiter). This lineage is of interest on account of the probable derivation 
therefrom of keeled forms. 
Neither of the genera Austiniceras and Tragodesmoceras is the direct 
ancestor of Parapuzosia ; for in the Turonian forms occur (cf . Puzosia 
curvatisulcata, Chatwin and Withers, and P. marlowense, Noble) which are 
still of the regular Puzosia type. The latter was compared to Desmoceras 
pyrenaicum, Grossouvre, which, however, is a Schluteria ; the former 
(P. curvatisulcata), with a very complex suture-line (B.M., No. C 12229), 
may be an Austiniceras, and resembles A.% gaudemarisi, Roman and 
Mazeran sp., but is too fragmentary for exact determination. 
Genus Parapuzosia, Nowak. 
11. Parapuzosia haughtoni, sp. no v. 
(Plate VIII, fig. 1.) 
\ 1921. Parapuzosia, sp. nov. ? ind., Spath, loc. cit. (Zululand), p. 224, 
pi. xix, fig. 2 ; pi. xx, figs. 1, la ; pi. xxiv, fig. 3. 
The large fragment (No. C 19439) on which this description is based, 
labelled " Pachy discus sp." by Crick, was referred to f as probably a Para- 
pachydiscus of the colligatus-supremus type on account of its resemblance 
in smoothness and section of the outer whorl and suture-line to those of 
the example here described as Parapachy discus aff. ootacodensis (Stoliczka). 
On preparation of the umbilical and dorsal portions of the fragment, how- 
ever, the ornamentation of the inner whorl was revealed, showing the primary 
and secondary ribs characteristic of Parapuzosia daubreei. 
At a whorl-height of 260 mm., the thickness was probably not more than 
180 mm. (not 200 mm., as stated in the footnote on p. 229, loc. cit.). The 
whorl -section thus agrees with that given by the writer for the Zululand 
form (loc. cit., pi. xx, fig. la), and is not so compressed as that of P. daubreei 
as figured by Nowak. J The umbilical wall is higher, and the whorl is 
thicker at the umbilical border in the South African form; on the other hand, 
there is no definite umbilical edge, as noted of P. daubreei by Grossouvre, 
but the sides are gradually rounded off into the umbilicus, as illustrated by 
* Loc. cit. (Zululand, 1921), p. 237. 
t Loc. cit. (Zululand, 1921), p. 229. 
% " Untersuch. u. d. Cepli. d. Ob. Kreide i. Polen." : III, Bull. Acad. Sc. Cracovie, 
Classe Sc. Math, and Nat., ser. B, June 1913, fig. 32, pi. xliii. 
