NEW ZEALAND MOLLUSCA. 321 
This species has some resemblance, both in form and sculp- 
ture, to 7. kuzysnaensis, Krauss, but it is narrower, suture less 
impressed, whorls not so convex ; the embryonic apex is very 
like, but in the “Challenger” species it is a little more swollen 
and depressed. 
-NATICA AMPHIALA, Watson, l.c. xv., p. 260. 
erivao! sjulyire, 1874. Lat. 37° 34° Sis long. 179° 22H. 
N.E. from New Zealand. 700 fms., Grey ooze. Bottom tem- 
perature, 40° F. 
Shell_—Thick, depressedly globose, with a small scalar, rather 
elevated spire, and a narrow obliquely-pointed base ; pale yellow, 
umbilicated. Sculpture—Longitudinals—There are many fine 
close-set lines of growth. Spirals—There are a few faint traces . 
of obsolete lines and furrows ; there is a slight angulation round 
the mouth of the umbilical pore. Colour is slightly brownish yel- 
low, but is pure porcellanous white below the epzdermis, which is 
thin, slightly puckered, smooth, not glossy, persistent. Spzre short. 
but abrupt andscalar. Ager seemingly rather large, but abraded, 
Whorls, 4-5 narrow, flatly rounded, of gradual increase to the 
last, which is disproportionately large, especially towards the 
mouth. Swzture strong, slightly channelled, almost quite horizon- 
tal. Mouth large, oval, very little oblique, and rather straight, 
scarcely pointed above ; it is more than two-thirds of the whole 
height. Outer-lip sharp, but strong, patulous throughout. Jz- 
ner-ltp straightish, but slightly concave in its whole length ; it is 
expanded on the labial callus, which is thick, but has no labial 
nor umbilical pad; the front of the pillar is thickened and flat- 
tened back on the very indistinct circumumbilical carina. OUm- 
bilicus is arather coarse, pervious, smallish round hole, hardly 
encroached on at all by theinner-lip. Operculum membranaceous 
thinnish, of a yellow colour, with a dark maroon outer edge which 
does not quite coil into the centre. H. 0.27, B.0.25; penulti- 
mate whorl, height, 0.07 ; mouth, height 0.21, breadth 0.17. 
This species combines a flattened globose form with a pro- 
minent pointed base and a small raised scalar spire, in a way 
that is very peculiar; so much so, indeed, that it almost recalls 
an Amphibola. A. tenuis, Gray, in particular, has features of re- 
semblance. It very slightly resembles VV. xana, Moller, from 
Greenland ; but the body whorl is more depressed, the spire is 
more enserted, and the umbilicus is not closed, as in that species. 
(To be continued). 
