Hutton. — On the Geology of Scinde Island. 329 



It thus appears that all the observers, except Mr. Cox, place 

 the Napier or Scinde Island limestone in the upper part of the 

 Wanganui system, which is directly opposed to the conclusion 

 drawn from the published lists of fossils. The stratigraphical 

 and palffioutological evidence seemed therefore to clash, and I 

 gladly availed myself of an opportunity that occurred last 

 January of visiting Scinde Island to try to clear up the diffi- 

 culty. This, with the able assistance of Mr. A. Hamilton, 

 of Petane, and Mr. H. T. Hill, of Napier, I think I have 

 accomplished. 



The result of my examination is to show that the northern 

 end of the island is formed by the Petane series. This series 

 rests unconformably on the Scinde Island limestone, which 

 forms, with the underlying sandstone, all the southern part of 

 the island, as shown in the accompanying section. (PI. XIII. , 

 fig. 6.) 



Collections of fossils from here, and from Petane, prove the 

 accuracy of Dr. Hector's opinion that the Petane beds are the 

 equivalents of the Wanganui beds. The fossils from the Scinde 

 Island limestone, however, show that it is the equivalent of the 

 Te Aute limestone, which is the same as the Pohue limestone of 

 Te Waka. 



Ahuriei Seeies. 



This series forms the main part of the island, from the 

 southern end to beyond Curling's Gully on the eastern, and as 

 far as the Taradale Bridge on the western side. It consists of 

 the following rocks, in descending order : — 



3. White earthy limestone, with bands of bluish-grey 



compact limestone with shells. 

 2. Yellowish sandstone, with irregular layers of compact 



limestone, passing downwards into — 

 1. Yellowish sandstone, glauconitic in places. The 

 lowest bed seen. 

 All three pass gradually into each other. 

 On the south-east side of the island this series dips about 

 S.E. 5°. To the northward, it gets horizontal, and then dips to 

 the north-west. On the east side, at Curling's Gully, the dip is 

 N.W. 20°; and on the west side, at Taradale Bridge, it is 

 N.N.W. 10°. The limestone is quarried in many places. Fossils 

 are generally in the form of casts, and are most abundant 

 in the upper parts, especially in Curling's Gully and Milton 

 Pioad. They are not, however, altogether absent in the lower 

 sandstones. I noticed the following : — 



1. Siphonalia mandarina, Duclos. (?) 

 *2. Trochita neozelanica, Lesson. 

 3. Crepidida monoxyla, Lesson. 



* Abundant. 



