Pleurodon maorianus, Hedley.
Pleurodon maorianus, Hedley. “Records of the Australian Museum,” v., 1904, p. 87, fig. 14.
This species appeared in profusion.
Dacrydium pelseneeri, n. sp. Plate II, fig. 8.
Shell small, thin, translucid with a nacreous lustre, oblong inflated, straight on the anterior side, rounded dorsally and ventrally, almost angled at the anterior dorsal corner. Umbo slightly projecting. A thin membranous epidermis clothes the valve. Sculpture regular-spaced elevated growth-lines. Hinge with a few anterior teeth, and a long row of posterior teeth which increase in size as they recede from the chondrophore. Height, 2·2 mm.; length, 1·48 mm.
A pair of valves.
The above is the third species recorded from the Southern Hemisphere. D. albidum was described by Pelseneer (Result Voy. “Belgica,” Moll. 1903, p. 27, pl. viii, f. 10) from 200 fathoms in the South Pacific, near the Antarctic ice-barrier. D. fabale was described by myself (P.L.S.N.S.W., xxix, 1904, p. 199, pl. x, f. 39) from 100 fathoms off Wollongong, N.S.W. From Marion Island E. A. Smith has published Dacrydium meridionalis, but Bernard has shown (Journ. de Conch., xlv, 1897, p. 8) that this is probably a Philobrya.
The novelty appears to differ from D. albidum by its rough surface and by its greater length in proportion to height. From its nearer ally D. fabale it differs by the straight edge of the anterior margin, and by being smaller and proportionally shorter.
Cochlodesma angasi, Crosse and Fischer.
Periploma angasi, Crosse and Fischer, Journ. de Conch., 1864, p. 349: 1865, p. 427, pl. xi, f. 1.
A single valve.
Verticordia rhomboidea, n. sp. Plate II, figs. 12, 13, 14.
Shell inflated, subrhomboidal, inequilateral, right valve slightly clasping over the left along the dorsal margin, sub-
stance very brittle, easily flaking off. Umbos incurved, rather distant, usually eroded. Lunule slightly excavated, dorsal area defined by the radial ribs. Sculpture, no incremental growth-lines, about twenty-two prominent sharp radial ribs which strongly denticulate the margin and imprint the nacreous interior, the surface has everywhere close-set grains which develop minute sharp prickles. Right valve with a large conical tooth under the lunule, and a posterior lateral beneath the dorsal area. Left valve with a minute tooth under the umbo and no lateral; ossicle not found. Height, 5mm.; length, 5·75mm.
Several specimens were taken.
The species apparently belongs to the subgenus Haliris, Dall. The genus, which is an acquisition to New Zealand, rarely occurs so high in the bathymetrical scale. Fischer proposed (Man. Conch., p.188) the term “verticordia zone” for the upper half of the abyssal region.
Cuspidaria trailli,Hutton. Plate II, figs. 9, 10, 11.
Neara trailli, Hutton, Cat. Marine Mollusca of New Zealand, 1873, p.62
One small and several broken shells were dredged. I have derived a figure from a specimen, 15 mm. in length, taken by Mr. A. Hamilton in Dusky Sound.