140 Transactions of the Royal Society of South Africa. 
the umbilicus. This is partly due to the larger size of the Pondoland 
examples ; for at a size corresponding with that of the geno-holotype, 
figured on pi. xx, fig. 2, of the Zululand paper, the umbilical tuberculation 
of the present specimens is pushed back to only a very slightly earlier stage. 
The term variety, thus, is hardly applicable to these forms. In example 
No. C 19426, however, here figured (Plate VI, fig. 5), of dimensions 46 — 
•52 — 29 — 13, the umbilical tubercle is decidedly more distinct than in 
the neotype, which seems to agree in this respect with Baily's lost holo- 
type. Dr. van Hoepen's figs. 1 and 2 of pi. ix represent a similar form. 
This was again selected as neotype by Dr. van Hoepen, but the writer had 
fixed the geno-neotype just previously. This form is transitional from 
the true P. umbulazi to the species described below as P. pseudofournieri, 
and thence to P. papillata. 
The new Egyptian species of Pseudoschloenbachia, mentioned by the 
writer on previous occasions and figured on Plate V, fig. 4, as P. humei, 
nov.,* is distinguished from P. umbulazi by more distinct costation and 
tuberculation, especially at the ventro-lateral edges. This Egyptian 
specimen is preserved as a chalcedonic cast, resembling the mode of 
preservation of a cast in flint of a new Sphenodiscus, allied to S. acuto- 
dorsatus, Noetling, from beds of the same age near Jerusalem 
(B.M. C 22136). 
Specimens No. C 19436-7 are associated with Hauericeras gardeni and 
Mortoniceras stangeri, in addition to other mollusca, in the same blocks. 
38. Pseudoschloenbachia pseudofournieri, nov. 
(Plate VI, fig. 3.) 
This species is based on example C 19425 of dimensions 57 — 48 
— 27 — 19, referred to previously (Zululand, p. 242) as being slightly 
constricted and transitional in ornamentation, from P. umbulazi to P. papil- 
lata. It differs from the former in the largeness of its umbilicus and the 
presence of the constrictions, in addition to the greater strength of its orna- 
mentation, with fewer, but prominent, umbilical tubercles. P. papillata 
represents a still more coarsely ornamented type, with a yet wider umbilicus. 
Ornamentation and constrictions of the present species recall Grossouvre's 
' Schloenbachia ' fournieri,^ probably belonging to the genus Gauthieri- 
ceras ; but the acute periphery of Pseudoschloenbachia and the numerous 
* Blanckenhorn's label, in German, attached to this specimen, reads as follows : 
" Schloenbachia n. sp. ind. aff. varians, yet not two, but three or four auxiliary lobes, 
i.e. three auxiliary lateral lobes and one umbilical lobe. The first lateral lobe unusually 
broad-stemmed, deeply bipartite. Cenoman ? " 
t Loc. cit. (1894), p. 112, pi. xxxv, fig. 1. 
