Appendix. Lists of Fossils From The Covering Beds, Motunau Plain.

Transactions and Proceedings of the Royal Society of New Zealand, Volume 63, 1934, Page 367

Appendix. Lists of Fossils From The Covering Beds, Motunau Plain. In 1927 Mr. E. W. Bennett, late of the Canterbury Museum, examined a collection of fossil mollusca from the covering beds of the Motunau Plain submitted to him by one of the authors (Jobberns), and stated that they might all be referred to Recent species. This collection has, unfortunately, been subsequently dispersed, and was not available for re-study. Towards the end of 1929 another collection was made by Dr. D. W. Johnson and the late Mr. S. J. H. Sylvester and lodged for examination with Dr. J. Marwick of the N.Z. Geological Survey. Lists from this collection have not been

published, but Dr. Marwick has very kindly permitted the present writers to add a supplementary list of his determinations to their own. Locality 1.—North Bank, Motunau River, one chain from the mouth. Upper Horizon. C. elotrochus tiaratus (Q. & G.). Zediloma digna Finlay. Mucrinops urbanior Finlay. Lepsithais lacunosa (Brug.). Mytilus planulatus Lamk. Aulacomya maoriana (Iredale). Mactra discors (Gray). Spisula aequilateralis (Desh.). Tawera spissa (Q. & G.). Middle or estuarine Horizon. Amphibola crenata (Martyn). Macomona liliana (Iredale). Chione stutchburyi (Gray). Lowest Horizon. Anchomasa similis (Gray). Locality 2.—Top of Sea Cliffs, ten chains south of the mouth of the Motunau River. Coelotrochus tiaratus (Q. & G.) Micrelenchus tenebrosus (A. Adams). Mucrinops urbanior Finlay. Dardanula roseola (Iredale). Stiracolpus symmetricus (Hutton). Maoricolpus of. roseus (Q. & G.). Zegalerus tenuis (Gray). Sigapatella novae-zelandiae (Lesson). Buccinulum aff. littorinoides. Buccinulum kaikouraense Powell. Xymene plebejus (Hutton). Axymene cf. turbator Finlay. Axymene corticatus (Hutton). Lepsithäis lacunosa (Brug.). Zemitrella choava (Reeve). Zemitrella pseudomarginata (Suter). Alcithoe sp. Baryspira depressa (Sow). Austrodrillia chordata (Suter). Melatoma buchanani (Hutton). Guraleus sinclairi (E. A. Smith). Kerguelenia australis (Q. & G.). Dentalium sp. indet. Aulacomya maoriana (Iredale). Limatula maoria Finlay. Ostrea sinuata Lamk. Venericardia purpurata (Desh.). Mactra ovata (Gray). Tawera spissa (Q. & G.). Paphirus largillierti (Phil.). Notirus reflexus (Gray). Gari stangeri (Gray). In addition to some of the above listed species, the following were identified by Dr. J. Marwick from the collection made by Dr. Johnson and the late Mr. Sylvester. Locality 2. Notoacmaea daedala (Suter). Micrelenchus sp. Conjectura glabella (Murdoch). Subonoba 2 n. spp. Estea cf. zosterophila (Webster). Estea cf. impressa (Hutton). Estea cf. subfusca (Hutton). Turbonilla sp. Odostomia densilirata Suter. Odostomia n. sp. aff. huttoni. Terebratella inconspicua Sow. Nucula hartvigiana (Pfr.). Lissarca cf. exilis Suter. Hochstetteria cf. meleagrina Bern. Cosa filholi (Bern). Chlamys cf. celator Finlay. Venericardia (Pleuromeris) n. sp. Verticipronus cf. mytilus Hedley. Condylocardia crassicosta Bern. Notolepton sanguineum (Hutton). Lasaea minutissima Iredale. Comparison of the faunas indicates that Locality 2 is the same as the Upper Horizon at Locality 1. Thus ten chains west of the mouth of the Motunau River the estuarine or Macomona facies below the marine cover is not present. The ancient estuary extended eastwards, however, at least as far as Motunau Island (q.v.) and for

some distance northward, where the estuarine beds with their characteristic fossils outcrop continuously along the top of the present marine cliffs. Comparison was made with the present distribution of all the species recorded, but in view of the incompleteness of our knowledge of this department no safe conclusions could be drawn. It seems tolerably certain, however, that the fauna is very close to the existing forms on the littoral at Motunau to-day.