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 congeneric 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 1·½ times aperture without canal). Whorls 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 keels there is, on body-whorl, a third keel, and below this about 4 strong spiral cords, all more or less prominently nodulose, the shell appearing to bear rather irregularly-dispersed and bluntly-pointed knobs. This irregular appearance is due to two factors—the increase in size of tubercles on peripheral keel as a varix is approached, and simultaneous decrease in size of tubercles on all other ribs, and to the progressive increase in number of 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 intercalated at even distances between peripheral keel and suture above. Besides 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 plaits; 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. The last four species and C. transennum (Sut.) form a rather compact group, distinguished by regular growth, prominent and prickly (or 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. The last species represents the extreme development of the warty prickles, and these give it a superficial resemblance to Austrotriton maorium, from which, however, it differs markedly in all details. The Australian representative of this group and of this species, and C. kaiparaense especially, seems to be C. intercostale (Tate). It has the same regular, staged, and prickly aspect as C. sculpturatum, and it may be noted that Tate