G. C. Crick—Cretaceous Rocks of Natal and Zululand. 339 
admirable description already published by Dr. Stirling and Mr. Zietz.' 
As pointed out by M. Dollo,® the reduced and opposable inner digit of 
the hind foot suggests that the immediate ancestors of Diprotodon 
were arboreal in habit. 
The slight discrepancy in the relative length of the limbs in the 
two reconstructed skeletons obviously causes a considerable difference 
in their general proportions and appearance. The curvature of the 
back and the relatively high forequarters in the British Museum 
specimen make it approximate more closely in attitude to Owen’s 
original tentative restoration® than to the plaster cast as mounted in 
Adelaide. In both cases the limb-bones seem to have been selected 
from several individuals, and Dr. Stirling and Mr. Zietz have not yet 
published their measurements of the complete skeletons as they lay on 
the ground before removal.t The final decision as to the exact 
proportions of Diprotodon must depend on these and other measure- 
ments of associated bones, for it is evident that individuals vary in 
size. While expressing our grateful appreciation of the valuable 
contributions which Dr. Stirling and Mr. Zietz have already made to 
our knowledge of this remarkable extinct Australian quadruped, we 
therefore venture to hope that their memoir on the whole skeleton 
will now soon be ready for publication. 
The original photograph of the skeleton of Diprotodon, used in 
preparing Plate XV, was taken by Sir J. Benjamin Stone, M.P., 
F.G.8., on the 14th June last, in the Hall of the British Museum 
of Natural History, Cromwell Road, and by his kind permission is 
here reproduced for the first time. 
II.—Tue Cretaceous Rocxs or Narat and ZULULAND AND THEIR 
CEPHALOPOD FAUNA. 
By G. C. Cricx, A.R.S.M., F.G.S., of the British Museum (Natural History). 
(WITH A PAGE MAP.) 
N the ‘‘ Third and Final Report of the Geological Survey of Natal 
| and Zululand ”’ that has just been published the Cretaceous rocks 
and their fauna receive considerable attention; Mr. William Anderson, 
F.G.8., the Government Geologist, gives an excellent summary 
(pp. 47-64) of all the information he had been able to obtain respecting 
the Cretaceous rocks of Natal and Zululand, and there are two 
contributions on the fauna of some Cretaceous deposits in Zululand, 
one by Mr. R. Etheridge and the other by the present writer. Before 
referring particularly to the Cephalopod fauna of the Cretaceous rocks 
of Natal and Zululand it may be of interest to give a brief sketch of 
the distribution of these rocks as recorded by Mr. Anderson. 
1K. C. Stirling & A. H. C. Zietz, ‘* Description of the Manus and Pes of 
Diprotodon austrahs, Owen”’: Mem. Roy. Soc. 8. Australia, vol. i (1899), pp. 1-40, 
pls. i-xvili. See also Grox. Mae., 1900, p. 28. 
2 L. Dollo, ‘‘ Le Pied du Diprotodon et Origine Arboricole des Marsupiaux’”’ : 
Bull. Sci. France et Belg., vol. xxxiii (1900), pp. 278-283. 
3 Loc. cit., 1870, pl. u. 
4 See the interesting photograph in Mem. Roy. Soc. 8. Australia, vol. i, pl. a, fig. 2. 
