MansnaALL.—Early Tertiary Molluscan Faunas of New Zealand. 121 
which is ascribed to the three species of Foraminifera which Thomson says 
have been identified by Chapman and are considered by him to indicate 
an Eocene age. Up to the present time Foraminifera have been collected 
but little in New Zealand, and unless the particular species referred to by 
Thomson have a most distinct Eocene occurrence and are absent in all other 
deposits in New Zealand little importance can be attached to them; and 
even if these conditions are fulfilled it is doubtful whether the indication 
of age given by them can stand against that given by the Mollusca and 
brachiopods, until at least far more extensive collections of Foraminifera 
have been made in New Zealand. 
In the face of such definite indication that the Weka Pass stone and the 
upper part of the Oamaru stone are of the same geological horizon, Morgan 
still classes the Weka Pass stone as Eocene and the Oamaru stone as 
Miocene (N.Z. Geol. Surv. Pal. Bull. No. 8, p. 101, 1921). Speight and 
Wild have conclusively shown that the Amuri limestone and the Weka 
Pass stone have a conformable contact (Trans. N.Z. Inst., vol. 52, pp. 87, 88, 
1918), and this makes it necessary to correlate part of the Amuri stone with 
the Oamaru stone. 
Art. 10.—-Some Tertiary Mollusca, with Descriptions of New Species. 
Ву P. MansHaLL, M.A., D.Sc., F.G.S., F.N.Z.Inst., Hector and Hutton 
Medallist, and R. Мовросн. 
(Read before the Wanganui Philosophical Society, 27th October, 1921 ; received by Editor, 
22nd December, 1921; issued separately, 8th February, 1923.] 
Plates 12-15, 
Lippistes benhami Sut. var. perornatus n. var. (Plate 15, figs. 6, 7.) 
distant as they approach to outer lip. between these are fine regularly- 
spaced threadlets, numerous in the wider spaces and all finely granulate 
at intersection of spirals. Aperture widely expanded, margin continuous, 
projecting above spire-level and below base, patulous ; columella almost 
straight, stout, concave, inner lip broadly reflected and projecting ; 
umbilicus moderately deep, not broad. 3 
