458 Transactions. 
Type (unique), from Pakaurangi Point, Kaipara Harbour (Ototaran 
or Hutchinsonian), in author's collection. The peculiarly close varices 
make the species somewhat resemble an Argobuccinum, but it is so evidently 
congenerie with the species described immediately before and after it that 
it is best referable to Cymatium. 
Cymatium sculpturatum n. sp. (Plate 48, fig. 7.) 
Shell of moderate size, turriculate, with several keels and irregular warty 
tubercles. Protoconch of 3 globose whorls. Four whorls follow, descending 
rather rapidly, so that spire is considerably elevated (about 14 times aper- 
ture without canal). oris quadrately convex, medially keeled, shoulder 
sloping at about 45°, thence descending vertically to lower suture, between 
which and peripheral keel is another strong keel. Below these two main 
tubercles on lower keels. On body-whorl of type, between the last varices, 
there are 7 nodules on peripheral keel (6 on some of the paratypes), then 
in succession 9, 11, and 13 on keels below it; increase most rapid near 
aperture. Irregularly - rounded undulating axial ribs extend from suture 
towards peripheral nodules, but they are not contiguous with them, and slant 
in various directions. These ribs render nodulose two weaker spirals inter- 
calated at even distances between peripheral keel and suture above. ide 
this characteristic primary sculpture of tuberculate keels there is an even 
more characteristic secondary sculpture. Interstices between the keels 
contain about 6 flattish and not prominent spiral riblets, distinctly and 
beautifully catenate, and alternately stronger and weaker, interstices linear. 
Crossing these in turn are numerous hair-like axials varying considerably 
in direction. This secondary sculpture becomes distorted and largely 
erased on nodules. Outer lip and most of canal missing on all specimens. 
Varices at a little less than three-quarters of a whorl, Epitoniform, convex, 
rather high and compressed, crossed by all the spiral and axial sculpture, 
but without nodules. Columella vertical, with two or three Marginelliform 
a a few close, strong, elevated plaits on parietal wall. Outer lip 
evidently strongly lirate-tuberculate inside. 
Height (without canal), 25 mm. ; diameter, 17 mm. ; height of aperture, 
11 mm. (holotype). Height (without canal), 37 mm. (?) ; diameter, 19 mm. ; 
height of aperture, 16 mm. (?) (largest paratype). 
. Holotype and seven paratypes, from Kakanui Beach (tuffs below the 
limestone), in author's collection. j 
Th our species and C. transennum (Sut.) form a rather com- 
ct group, distinguished by regular growth, prominent and prickly des 
tubercular) spiral sculpture of two stronger peripheral ribs and two weaker 
ones above them on shoulder with regularly diminishing spirals on base, and 
reticulate secondary sculpture, the spiral part of which is often catenate. 
ast species represents the extreme development of the warty prickles, 
and these give it a superficial resemblance to Austrotriton maorium, trom 
