Marwick.—Naticidae and Naricidae of New Zealand. 553 
Localities.—Recent specimens in Dominion Museum, locality unknown ; 
Castlecliff, Wanganui; 1163, Kai Iwi, Wanganui (type); 1096, clay below 
limestone, Petane; 1145, mouth of Onairo Stream, Waitara Survey Dis- 
trict ; 1146, mouth of Waiau Stream, Waitara Survey District. 
It is possible that this shell is a Uber (Euspira), for it closely 
resembles P. vitreus. It is just as like the openly umbilicated forms of 
N. maoria, however, so is classed here as a Natica. 
Natica maesta n. sp. (Plate 55, fig. 17.) 
Shell small, suboval; spire depressed; whorls convex, body-whorl 
subeylindrical ; suture deeply impressed; aperture semilunar; outer li 
slightly concave in middle, antecurrent to suture, inclined about 20° 
from vertical; inner lip with moderate parietal pad of callus coalescing 
with so as to mask funicle; umbilicus very narrow, almost closed. 
Type in collection of New Zealand Geological Survey. 
Height, 7 mm. ; diameter, 7 mm. 
Localities.—1129, Whitecliffs, Taranaki (type); Tukituki, Waiapu, East 
Cape district. 
This species is somewhat like some Recent forms of N. maoria with 
an almost closed umbilicus, but it differs from them in its deeply impressed 
suture. The Waiapu specimen is more effuse at anterior corner of aperture, 
and more specimens might justify their separation as a distinct species. 
a. Subgenus CARINACCA n. subg. 
Shell of moderate size, ovate, smooth, widely umbilicated ; spire low ; 
suture sometimes slightly impressed but generally tangential; aperture 
semilunar; outer lip practically straight. but strongly retracted to suture, > 
i ° to 30° from vertical; inner margin straight with short, fairly 
thick parietal callus; umbilicus with an obsolete funicle on its long 
apertural margin (sometimes absent altogether), and bounded by broad 
strong ridge formed by a prominent thickening of apertural margin at 
ype: Ampullina waihaoensis Suter. 
Suter classed the type under Ampullina because of the strong basal 
limb, but it differs from that genus in its ovate shape, tangential suture, 
rudimentary umbilical funicle, and also in the disposition of the basal limb. 
In Ampullina this is a step, but in А. waihaoensis it is a well-defined 
ridge. There is considerable similarity to Natica burdigalensis Mayer and 
related species (Aquitainian), although none of them has such a well- 
developed basal limb. Natica macrotrema Ad. & Reeve from the living 
fauna of Borneo (Tryon, 1886, pl. 22, fig. 27) also appears to be related. 
Shell large, globose, smooth; spire low, often almost flat, suture 
tial; aperture simi i 
tangen lunar; outer lip with a shar 
г : ; p edge, slightl 
sınuous and strongly retracted to suture, inclined about 25° а и 
inner margin with moderate parietal callus ; umbilieus always 
open, with a weak fu ar ridge or step inclined to become obsolete, and 
