McKay.—On the Reptilian Beds of New Zealand. 588 
miocene period. The same beds at the Weka Pass and upper part of the 
Waipara section are by him considered to be of upper eocene age. * 
In 1874 I made an examination, for the New Zealand Geologieal Survey 
Department, of a part of the Waipara district, with the object of ascertain- 
ing the extension of the lower beds of the series in a westerly direction, 
the collection of fossils, and to determine the relation of Weka Pass 
calcareous greensand to the underlying Amuri limestone and the overlying 
grey marls. 
During April, May, and June of 1876, I made the collections and exami- 
nations already alluded to, the results tending to confirm the view that the 
entire series as seen at the Amuri Bluff follow in unbroken sequence, of 
which, with the Waipara beds, the following is a comparative statement :— 
WAIPARA. Awuni Buurr. 
1. Mount Brown Limestone. 1. Wanting. 
2. Grey Marl. 2. Grey Marls. 
3. Weka Pass Caleareous Sand- 3. Weka Pass Caleareous Sand- 
stone. stone. 
4. Greensand Conglomerate. 4. Greensand Conglomerate. 
5. Amuri Limestone, embracing 5. Amuri Limestone. 
a. Tucoidal Limestone. a. de 
b. Flaggy A b. 5 
c. Flinty is ; and c. js 
d. Chalk Marl or Leda Bedi. d. z 
6. Teredo Limestone wanting, or 6. Teredo Limestone. 
merged in 7. 7. Concretionery Greensand. 
7. Concretionary Greensand. 8. Boulder Sands, Saurian Beds. 
8. Boulder Sands, Saurian Beds. 9. Black Grit. 
9. Glance Sandstone. 10. Aporrhais Beds. 
10. Conchothyra Beds. 11. Trigonia Beds. 
11. Trigonia Beds. 12. Belemnite Beds.1 
12. Grey and Rusty Sands. 
In the section at Amuri Bluff the grey marls are not overlaid, as in the 
Waipara section, by the Mount Brown limestones; these beds, if ever 
present at Amuri Bluff, having been removed by denudation. The grey 
marls are here the highest beds, and have partially been removed by denu- 
dation. They are present both to the east and west of the older rocks, 
which divide the two wings of the cretaco-tertiary formation at Amuri 
Bluff. On the eastern wing, Dr. Haast calls them Leda beds; on the 
* ** Geol. Reports," 1872-3, p. 47, and Sec. 5. : 
+ The three last beds are distinguished by the abundance of the fossils from which they 
take their names. 
