Park. — Marine Tertiaries of Otago and Canterbury. 507 



the Hampden clays, of which seventeen, or 48-6 per cent., 

 are living forms. 



Captain Hutton's list contains the following fossils not 

 found by me : — 



1. Scaphella australis, Quoy and Gaimard. 



2. Siphonalia nodosa, var. conoidea, Hutton. 



3. Cominella, sp. ind. 



4. Nassa tatei, Tenison- Woods. 



5. Pleurotoma buchanani, Hutton. 



6. Natica suturalis, Hutton. 



7. Cerithium cancellation, Hutton. 



8. Turritella rosea, Quoy and Gaimard. 



9. Trochus (?) sp. ind. 



10. Meretrix multistriata, Sowerby. 



11. Trigonia pectinata (?), Lamarck. 



12. Solenella funiculata, Hutton. 



13. Mytilus magellanicus, Lamarck. 



14. Entalophora zealandica, Mantell. 



Of the thirteen molluscs in this list, five, or 38-5 per cent., 

 are still living. 



Kakanui Valley, near Maheno. 



Behind Clark's mills, on the north side of the Kakanui 

 Valley, nearly opposite Maheno Eailway-station, which is 

 about a mile away, there is a long line of steep escarpment 

 crowned by the Oamaru Stone. The beds forming this cliff 

 extend northward to Teschemaker's, and eastward — that is, 

 down the valley — about a mile. The most complete section 

 is exposed about 6 chains below Clark's mills, where the 

 Waiareka tuffs, forming the base of the cliff, are followed by 

 a horizon consisting of grey clays interbedded with coralline 

 limestone, which is in turn overlain by calcareous sandstones 

 intercalated with two sheets or sills of olivine-basalt. 



The tuffs contain a few indistinct fossils, and bed No. 7 

 several minute bivalves and numerous Foramintfera. Beds 

 Nos. 9 and 11, and possibly No. 6, represent the Oamaru 

 Stone proper. The presence of the basalt sill shows that 

 volcanic activity was nearly contemporary with the deposition 

 of the lower part of the Oamaru Stone in the Kakanui area. 

 Elsewhere, both to the north and south, activity appears to 

 have ceased somewhat earlier. 



At Clark's mill the Oamaru Stone is interbedded with a 

 bed of clay with white chalky joints. This bed varies from a 

 thickness of 12 ft. behind the mill to a few inches at Tesche- 

 maker's, less than a mile distant. West of the latter place 

 it thins out altogether. The basalt sill as seen in the longi- 

 tudinal section of the escarpment, about 2 chains nearer 



