On the Senonian Ammonite Fauna of Pondoland. 
133 
bifid, outer saddles gradually and regularly decreasing to the umbilical 
border. The four or five inclined simple saddles of the umbilical wall 
also slope down to the umbilical suture more regularly even than those of 
P. tiveenianus (Stoliczka).* 
18. Parapachy discus simplex, v. Hoepen sp. 
1921. P achy discus simplex, v. Hoepen, loc. cit., p. 25, pi. v, figs. 3 and 4, 
text-fig. 14. 
This species, belonging to the ganesa-cricki group of Parapachy discus 
(see ante, p. 132), is not represented in the present collection. 
19. Parapachy discus umtafunensis (Crick MS.), Spath. 
(Plate IX, figs. 4a, b.) 
1921. Spath, loc. cit., Zululand, p. 229, footnote 5. 
1921. „ „ Pondoland, p. 49. 
This species, represented by the two examples (Nos. C 19434-5) of 
dimensions 75 —-35 —-36 —40 and 72-5 — -34 —-35 —-39, already referred to 
by the writer, at first sight seems identical with P. antecursor, v. Hoepen 
sp., but has Th>H, whereas v. Hoepen's single example is described as 
having the whorl-thickness equal to or less than the height. The real 
difference, however, appears to be in the suture-line, that of the present 
species showing very good agreement with the suture-lines of the South 
American forms of the group of P. hauthali, Paulcke sp., and especially 
with that of P. amarus, Paulcke sp.f 
P. tweenianus (Stoliczka), to which the species had been compared by 
Crick, has a different type of ornamentation. 
20. Parapachy discus antecursor, v. Hoepen sp. 
1921. Pachydiscus antecursor, v. Hoepen, loc. cit., p. 24, pi. v, figs. 
1 and 2, text-fig. 13. 
This species was compared by its author to a number of pachydiscoid 
developments, of which only P. tiveenianus (Stoliczka) is distantly related. 
In this species, however, the ribbing increases in strength, relatively, on the 
outer whorls, and the inner whorls are smooth. 
* Loc. cit. (1865), pi. lv, fig. 16. 
f " Ceph. d. Ob. Kreide Siidpatagon.," Ber. Nat. Ges. Freiburg., xv, 1907, p. 62, 
text-fig. 29. 
