138 
- may add that we do notaccept all the species noted by Messrs. Hall 
and Pritchard as restricted (for Spring Creek) to the upper clays, 
two or three of them having been found by us in the basal beds 
also. If there are really two zones at Spring Creek they must be 
very minor ones, the variations in their faunas being slight, and 
further collecting from both is advised before announcing definite 
conclusions as to their import. 
For the fossils of the Lower Maud beds the same authors claim 
a similarity to those from Spring Creek, but we are unable to 
trace any special affinity between the two faunas. Their revised 
table of Maud fossils, just received,* contains only 37 species of 
mollusca, but a collection made at the section by Mr. Mulder and 
one of us gives a total of 66. Of these, 33 species are represented 
at Muddy Creek, and 23 at Spring Creek, but 18 of the latter are 
also.included amongst the Muddy Creek representatives. Of the 
five Spring Creek shells remaining, none are special to that sec- 
tion, and occur also in one or other of the extra-limital deposits. 
At least six of the species obtained by us are new and apparently 
restricted to this small exposure. The names and distribution of 
the Maud fossils on our list will be found in Appendix I. 
At a higher level, and therefore probably overlying the fossil- 
iferous strata, an outcrop of basalt is visible, which by the Survey 
is mapped as Older Volcanic. Messrs. Hall and Pritchard, in 
speaking of it, say, ‘‘there is, we now think, not sufficient evidence 
to suggest a subdivision of the voleanic rock,”+ which means that 
they regard the Maud basalt as the equivalent of that which 
underlies the marine Eocenes of Flinders and Eagle Rock. We 
do not pretend to say without a fuller study of the Maud section 
whether this is the case or not, though the reported relations of 
the igneous rock to the accompanying sedimentary strata would 
lead to a different conclusion. Below the shell-beds, or littoral 
deposit, a polyzoal limestone appears, which, though of consider- 
able thickness and easily separable from the overlying sandy beds, 
is not mentioned by Messrs. Hall and Pritchard in either of their 
papers. We have picked out pectens and other fossils from it, 
and observe that they are the ordinary ones yielded by such 
strata. Polyzoal limestone is also said to rest upon the Maud 
basalt, but the significance of this has yet to be worked out. The 
list of fossils from the Upper Maud beds given by Messrs. Hall 
and Pritchard cannot be appealed to, since most of the gastropods, 
it is stated, come from a deposit overlying polyzoal limestone, 
some miles distant. In their first paper great prominence was 
given to the argument that the Upper Maud and Waurn Ponds 
beds lie on the same horizon, and a-comparative table of fossils 
was supplied to demonstrate their close affinity. In the lately 
> Op: Cit. , 
+ Older Tertiaries of Maud, &c. Proc. Roy. Soc., Vic., 1895. 
