J. T. Stewart. — On an Artesian Well. 451 



present, under a moderately magnifying power, a structure 

 which shows that the bone belonged to a bird. There is, 

 however, no proof that it can be referred to the Dinornis. Mr. 

 Tomes and Mr. Bowerbank, who have obliged me by examining 

 the specimen, concur in this opinion. Insignificant as this 

 fact may appear, still, in these early pages of the palagonto- 

 logical history of our antipodean colonies, it is worthy of 

 remark that the first-discovered fossil relic of the terrestrial 

 Vertebrata in the Tertiary strata of New Zealand should belong 

 to that class which, in later periods, constituted the principal 

 types of the warm-blooded animals of the fauna of that 

 country, to the almost entire exclusion of the Mammalia 

 — G. A. M. 



DESCRIPTION OP PLATES XXIX.-XXXV. 



Plate XXIX. Moeraki Beach, with septaria. 



Plate XXX. 



Plate XXXI. 



Plate XXX 1 1. „ „ weathered. 



Pute XXXIII. „ „ decomposed. 



Plate XXXIV. Cone-in-cone limestone. 



Plate XXXV. 



Art. XLIV. — Note on an Artesian Well at Aramoho. 



By J. T. Stewart, C.E. 



[Read before the Wellington Philosophical Society, 6th August, 1901] 



About three miles above Wanganui, on the Wanganui Eiver 

 bank, a 4 in. bore has been made by Mr. John Walker, jun., 

 in search of water. There is, of course, much speculation as 

 to where the water comes from. It is struck under a layer of 

 papa (280 ft. thick), and water was struck at bottom of this 

 layer, at 540 ft. below the surface, in a layer of sand inter- 

 mixed with pumice sand. The surface here may be 30 ft. to 

 40 ft. above the sea. Perhaps the water gets under the main 

 papa stratum where it has been pierced by the volcanic 

 heights about Buapehu and Tongariro and follows down 

 under the papa formation to where found. I found the 

 temperature of the water coming out of the pipe at the sur- 

 face to be 70^° Fahr., while the adjoining river'water was 42° 

 at 6 ft. under the surface. The temperature in the shade at 

 the time was 45°. 



A few T years ago a 2 in. bore was put down at the same 



