552 Transactions. 
retracted to suture above but otherwise straight, inclined at about 20° 
from vertical; umbilicus small but penetrating, hardly encroached on by 
apertural callus, which bears two denticles on lower pt an ps 
Нуре in collection of мам Zealand Geological Survey. 
Height, 6 mm.; length, 6m 
Locality. —Mount Harris, South Canterbury. (= Р. amphialus of Suter, 
1921, p. 64.) 
A fairly large shell of a similar nature occurs in bed 6B at Clifden, 
Southland, but ‘the available specimens were not complete enough to show 
whether they were adults of the Mount Harris shell or a different species. 
Natica maoria Finlay. (Plate 55, figs. 16, 18.) 
1878. Lunatia australis Hutton, Journ. d. Conch., vol. 26, Ag E: 
1803. Хайса australis Hutton, Macleay Mem ‚ Vol., p. sh, pl 7, fig. 38 (not of — 
"Orbigny). 
1924. Natica pf Finlay, Proc. Malac. Soc., vol. 16, p. 101. 
Lectotype in Otago — 
Height, 6mm. ; diameter, 6 mm. 
Localities. —Recent (type ei Auckland); Castlecliff ; Kai Iwi; 1063, 
Okawa Creek, Ngaruroro River; 1096, Esk Bridge, Petane ; 1040, Twaite's 
Cutting, five miles south of Martinborough. 
Each of Hutton's three syntypes has a fairly open umbilieus and 
"urine funicle. Me specimens from Auckland in Suter collection and 
о 
very wide umbilicus and a thinner inner lip than the typical specimens, and 
no examples with a narrow opening were seen. At Castlecliff and Kai Iwi 
both forms are present, so it seems advisable for the present to recognize 
only one species. 
In the widely umbilicated specimens the funicle is absent ; sometimes, 
but not always, there is a slight furrow to mark its lower extremity. 
Such shells as the Petane ones, if considered on their own merits, Wo 
be classed as Euspira, but they are certainly closely related to if not 
specifically identical with N. maoria, which has a shelly operculum. 
Natica denticulifera n. sp. (Plate 55, fig. 9.) 
Shell small, ovate; spire raised, over half height of Mene ; whorls 
5, convex, often slight dy depressed below suture; protoc nch smooth, 
ucl | orls hed, with 
grow lines we gre stronger near suture, which is abutting > 
oo p very slightly sinused above and scarcely 
to suture, inclined 25° from vertical, inner margin straight with 
light parietal callus, lower eras of which half-covers umbilicus ; lower 
ge О аз шы еШ 
оп ; ess 
paese of apertural callus iuda 1 пеге жеке зит 
otype in collection of N 
Height, 9 mm.; diameter, аба Zealand ‘Geological mr 
