846 = G. C. Crick—Cretaceous Rocks of Natal and Zululand. 
the Tributaries of the Manuan Creek, Zululand.’? Most of these, 
principally Nautili, were stated to have come from the ‘South 
Branch, Manuan Creek,’’ a few only being labelled ‘‘ Crossing Middle 
Tributary, Manuan Creek.” It would appear, however, from 
Mr. Anderson’s remarks in the Report which has just been issued 
(p. 59) that all the specimens which the present writer has described 
from the “Tributaries of the Manuan Creek”? were obtained from 
the deposit which has been referred to above! as occurring on the 
left-hand bank of the middle tributary. ‘‘ The outcrop,” says 
Mr. Anderson, ‘‘is a very small outlier, exposed on the slope of the 
northern bank of the creek, and is completely isolated on the Rhyolite. 
This exposure passes along the north side of the creek for a distance 
of a few hundred yards. The strata, as exposed in the cliff, which is 
about 20 feet in height, consists of a dirty grey-brown calcareous 
sandstone, which contains the chief specimens of the Cephalopoda, 
both Ammonites and Nautili. Below this, about 15 feet of shales. 
and marls, chiefly containing Mollusca and other forms.” Since 
the matrix of the specimens marked ‘‘ South Branch, Manuan Creek,” 
agrees with Mr. Anderson’s description of the upper part of this 
deposit, it would seem that they were obtained from this portion, 
whilst the few fossils labelled ‘‘ Crossing Middle Tributary, Manuan 
Creek,’ may have been obtained from the lower portion consisting of 
shales and marls. At any rate, the few specimens labelled “‘ Crossing 
Middle Tributary, Manuan Creek,’’ seem to indicate a somewhat 
lower horizon than the fossils labelled ‘‘South Branch, Manuan 
Creek.”” The fossils from this deposit are as a rule fragmentary and 
very imperfectly preserved. The general facies of this fauna differs . 
somewhat from that of the False Bay fauna; the latter is characterized 
by an abundance of forms of Acanthoceras, the fauna of the upper 
part of this deposit by the prevalence of Nautili. Whether the fauna 
of the upper part of this deposit is simply another facies of that 
found at False Bay is not quite certain; it may be, or it may possibly 
indicate, a somewhat higher horizon, but the specimens labelled 
‘“‘ Middle Tributary, Manuan Creek,” that we believe to be from the 
lower portion of this outcrop, seem to show the existence in this 
deposit either of the lower portion of the beds which are exposed at 
False Bay, or even of a slightly lower horizon. 
A review of the faunas obtained from the several exposures of 
Cretaceous rocks in Natal and Zululand seems to confirm Mr. Anderson’s 
statements (Third Report, pp. 48-49): (1) that ‘all the fossils obtained 
from the various localities where exposures of these rocks have proved 
fossiliferous, in Natal and Zululand, belong to the Upper portion of 
the Cretaceous System” ; and (2) that ‘‘so far as our present know- 
ledge goes, no representatives of the Lower Cretaceous have yet been 
proved in Natal or Zululand.’”? The beds near the mouth of the 
Umpenyati River in Natal are evidently of the same age as the 
Pondoland deposits, whilst the beds which are found in the southern 
part of Zululand, at Umkwelane Hill and in the boring north of the 
Umhlatuzi lagoon, are probably also of the same age. Further north, 
however, near the north end of False Bay, rocks of Cenomanian age 
occur, and to the west of these, in the neighbourhood of the Manuan 
1 See ante, p. 340. 
Oe ee 
