Marshall. — Fauna of the Hampden Beds. 249 



now suggest the following divisions of the system in amplification of that 

 proposed by me in a former paper* : — 



AMARU System. 

 Probable European equivalent, Senonian to Pliocene. 



Castlecliff Series (80-90 per cent, of Recent species). 



Characteristic fossils : Bezanconia huttoni, Calliostoma ponderosum, 

 Actaeon ovalis. 



Until full collections have been made from these beds it is a little 

 difficult to fix the boundary -line between them. At present it seems to 

 me to be best placed at the horizon of the Moa bed, one mile south of the 

 Xiikumaru Beach. 



The beds of the whole system certainly show a complete faunal grada- 

 tion throughout, and it is therefore impossible to select fossil species that 

 are entirelv absent from the series above and below. In several cases the 

 species that have been cited are found also in other series. It is thought, 

 however, that they are more characteristic of the series under which they 

 are mentioned than of the others. 



Nukumaru Series (70-80 per cent, of Recent species). 



Characteristic fossils : Melina zealandica, Lutraria solida, Lucinida levi- 

 foliata, Ataxocerithium perplexum, Struthiolaria frazeri. 



A full list of species from this series has not yet been published, but it 

 is hoped that this will be done next year. This series probably includes 

 the Matapiro and Petane beds. 



Waipipi Series (60-70 per cent, of Recent species). 



Characteristic fossils : Ostrea itigens, Pecten triphooki, Cardimn spatiosum, 

 Lima waipipiensis, Diplodon ampla. 



Collections from this locality are not yet completed. It is probable that 

 localities near Hawera and in the higher portions of the Wanganui River 

 contain a fauna that will fill in the gap between the Waipipi and the Target 

 Gully series. The probability of this is shown by the collection made by 

 Park from the Paparoa, on the Upper Wanganui River. t 



The Greta and the Awatere beds and those at Castle Point may occupy 

 a position intermediate between the Target Gully and the lower beds of the 

 Wanganui coast-line — the Waipipi series. The collections that have been 

 made up to the present are not sufficiently extensive to settle this matter 

 definitely. 



Target Gully Series (30-40 per cent, of Recent species). 



Characteristic fossils : Venericardia pseutes, Terebra orycta, Vexillum 

 rutilidommn, Murex octogonus, Calyptraea maccoyi, Turbonilla oamarutica, 

 Murex angasi, Chama huttoni, Fusinus cUmacotus. 



Nearly all species, however, are found in higher or in lower strata as 

 well as in the Target Gully beds. In addition to species previously recorded 

 from these beds I wish now to record Venericardia hollonsi, Ficus suhtran- 

 sennus, Loripes concinna, Drillia laevis, Nucula sagittata, Leda semiteres. 



* P. Makshall, Tran.'i N.Z. Inst., vol. 48, p. 119, 1916. 



t J- Park Reports Geol Exploratioiis during 1886-87, p. 1 7.'5, 1 887 



