On the Senonian Ammonite Fauna of Pondoland. 
143 
a direct descendant of Diaziceras, but must be looked upon as a more or 
less parallel development therewith of the normally lobed Pseudoschloen- 
bachia and the form described as gen. nov. (Muniericeras ?) cricki, Spath. 
Eulophoceras, if distinct at all, is a closely similar development. From 
Hyatt's description, however, it appears that the ornamentation of his 
somewhat imperfect holotype of Eulophoceras is not strongest at the um- 
bilical and the ventro-lateral shoulders, as in Diaziceras and in the early 
whorls of Spheniscoceras. 
The fact that Dr. van Hoepen, who again created a new genus for the 
group here discussed, did not record the true Eulophoceras natalense, con- 
firms the writer's opinion that the separation of Spheniscoceras from Eulo- 
phoceras is not well founded, and Hyatt's type, which is not well preserved^ 
may represent only an extreme variation. 
Lenticeras ? jullieni, Pervinquiere, which was included in the present 
stock by Dr. van Hoepen, is here considered to belong to the Coniacian 
family Tissotidae. It was selected as type of Prelybicoceras, Douville,* 
already in 1912. 
The internal suture-line of Sph. tenue is here figured for comparison 
with that of Sphenodiscus, in which genus more pronounced reduction has 
resulted in monophylloid saddles. This character induced Salfeld f to 
consider the genus Sphenodiscus and the families Placenticeratidae, Coilo- 
poceratidae, and Engonoceratidae to belong to the super-family 
Phylloceratida. 
43. Spheniscoceras africanum (Crick MS.), Spath. 
(Plate VI, fig. 1.) 
1921. Spheniscoceras africanum (Crick MS.), Spath, loc. cit. (Zululand), 
p. 242, fig. Cla, p. 243. 
1921, ? Pelecodiscus capensis, v. Hoepen, loc. cit., p. 32, pi. v, fig. 11. 
1921. Spheniscoceras africanum (Crick MS.), Spath, Pondoland, table 
to p. 50. 
The holotype of this species (C 19421) of dimensions 157 — 59 — 28 
— 03, was described in detail by Mr. Crick, but there is now no need to 
give the original diagnosis. Dr. van Hoepen's small form is doubtfully 
included here. Its suture-line, however, shows inclination towards the 
umbilicus, like the suture-lines of the other species mentioned below. 
* "Evohit. and Classif. d. Pulchell.," Bull. Soc. Geol. France (4), xi, 1911, fasc. 4-5 
(1912), p. 315. 
f " Ub. d. Ausgestalt. d. Lob. Lin. b. Jura und Kreide Amm.," Nachr. K. Ges. Wiss. 
Gottingen, Math.-Phys. Kl., 1919, pp. 8 and 9 (of separate copy). 
