Hill.— 0;i Artesian Wells. 429 



have yet been met with in any of the sh^te rocks of this dis- 

 trict. The members of the Geological Survey have classed 

 them as Palaeozoic, and the name has been retained here, 

 though its meaning is so wide and indefinite. 



Addendum. — Since the above paper left my hands I have 

 again visited the volcanic district by way of Kuripapanga, and 

 I find that the sands referred to as being seen at Blowhard 

 underlie the limestones and pass into streaky clay-sands, 

 which are the upper beds of the slates. In two places near 

 Blowhard Secondary rocks appear similar to those seen at 

 Kuripapanga. On the hill known as " Gentle Annie," beyond 

 Kuripapanga, there is to be seen on the roadside a large lime- 

 stone boulder. This rests on the slates, and is, I suppose, a 

 remnant of the limestones which once covered the whole of 

 the hills in this district. The highest limestones appear 

 about midway between Erehwon and Euapehu, at a height of 

 4,720ft. They rest on the Secondary rocks, and are full of 

 fossils, mostly bivalves. 



Akt. LI. — Artesian Wells : No 2. 

 By H. Hill, F.G.S. 



[Read before the Hawke's Bay Philosopliical Institute, 7th October, 



1889.] 



Plate XXXI. 



As an addendum to the paper read by me two years ago" on 

 the artesian-well system of Hawke's Bay, the following 

 additional facts will be found of interest and importance. For 

 those not acquainted with what is known as the Heretaunga 

 Plain, it may be explained that in this paper it includes the 

 district extending from Napier to Pakipaki, with the Borough 

 of Hastings towards the centre. The distance between the 

 two places is about eighteen miles, with a breadth varying 

 from eight to ten miles. Within certain limits this plain is an 

 artesian water-bearing basin sloping to the north-east, and 

 troughing on the south-east to the north-west, and on the 

 'north-west side to the south-east ; thus forming a synciine 

 between the two opposite exposures extending for about ten 

 miles. 



Since the date of the paper referred to, which treated as 

 fully of the subject under notice as it w^as possible to do with 



" " Trans. N. Z. Inst." vol. xx., p. 282. 



