FiNLAY.—New Zealand Tertiary Rissoids. . 487 
early whorls p is coy subangled, but becomes convex later ; 
each whorl clasps the above rather closely but leaves margining sutural 
high, about twice height of aperture, outlines pupiform. Aperture ovate, 
laterally compressed, pecie oblique. Outer lip broken, but apparently 
thin and sharp; peristome nearly continuous. Columella very oblique. 
Inner lip very slightly reflected, spread as a callus over columella and 
al wall. 
l. 
n of the New Zealand Geological me Collec 
aratype reproduce sculpture of holotype exactly except that second- 
lowest rib on base is unduly accentuated, forming almost a blunt carina, 
ros ende traces of ла pos are present. 8 species is related to 
isulcata (Hutt.), but has far more numerous and more persistent 
pak, and a taller and thinner shell; it is still pin to the following 
species, which, from Hutton’s description. seems to be well distinguished 
by its stronger "n ribs, relatively greater width, and lack of spiral 
ornament on bas 
Estea rugosa (Hutt.). 
Only one juvenile specimen of this species has been available for 
examination, so that it is not generically placed with absolute confidence, 
but the figure and description seem fairly definitely to indicate this E 
ay. 
Locality : Petane, Nukumaru. 
Estea impressa (Hutt.). 
Characterized by the stout sloping axial riblets on the lower сен 
the infrasutural groove, and the minute size of the shell. Related to s 
Australian forms as E. kerskawi Ten.-Woods. 
Localities : Castlecliff, Petane, Waikopiro, Nukum 
Recent E. minor (Sut. )—which Suter fede 40 a variety of 
E. zosterophila (Webster), but which is certainly worthy of specific rank— 
is a totally unsculptured relative of this species. 
Estea semisulcata (Hutt.). 
TEE 
Distin guished by having about 4 spiral cords, with linear interstices, o 
the last rem whorls only ; otherwise very similar to E. zosterophila крет), 
to which it bears somewhat the same relation as E. impressa does to E. т 
Localities : Castlecliff, Nukumaru 
Estea zosterophila (Webster). 
Locality : Castlecliff (fide Suter, Man. Moll., 11). 
This record needs confirmation ; it mieu i is based on a worn 
Е. impressa (Hutt.). 
