540 Transactions. — Geology. 



to the railway, cross the valley, and stretch westward to 

 Mount Brown. 



This horizon of impure limestone and calcareous sand- 

 stone cau be traced for miles along the crest of Mount Donald 

 and Mount Brown, forming a steep escarpment facing the 

 northern aspect of these ridges. In some places it is crowded 

 with fossils, in others almost destitute of them. 



At Weka Pass fossils are not very abundant, and for some 

 distance along the escarpment going towards Mount Donald 

 very few are seen excepting corals. Some mile and a half 

 north of the pass, near the highest part of Mount Donald, 

 the beds become richly fossiliferous for a stretch of 15 chains. 

 At this place I made a large collection of well-preserved fossils, 

 which included the following species : — 



1. Kekenodou onomata (?), Hector. 



2. Garcharodon mcgalodon, Agassiz. 



3. Aturia australis, McCoy. 



4. Pleurotoma aivamoaensis, Hutton. 



5. Sca2)hella elongata, Hutton. 



6. Scaphella corrugata, Hutton. 



7. Siphonalia nodosa, Martyn. 



8. Audita hebera, Hutton. 



9. Natica gibbosa, Hutton. 



10. Girsotrcma broivni, Zittel. 



11. Creptdula monoxyla, Lesson. 



12. Galyptraa ca yptraiformis, Lamarck. 



13. Cassidaria senex, Hutton. 



14. Turritella cavershamensis, Harris. 



15. Xenophora (sp. ?). 



16. Dentatium mantelli, Zittel. 



17. Ostrea ivutlerstorfi, Zittel. 



18. Ostrea angasi (?). 



19. Anomia aiectus. Gray. 



20. Lima paleata, Hutton. 



21. Lima bullata, Born. 



22. Pecten beethami, Hutton. 



23. Pecten williamsoni, Zittel. 



24. Pecten hutchinsoui, Hutton. 



25. Pecten (sp. nov.). 



26. Pseudamussium huttoni, Park. 



27. Cucuilaa alta, Sowerby. 



28. Glycimeris globosa, Hutton. 



29. Glycimeris sti-iatulans, Lamarck. 



30. Limopsis insolita, Sowerby. 



31. Dusiuia magna, Hutton. 



32. Dosinia greyi, Zittel. 

 •'!:!. Panopcea orbita, Hutton. 



