Hedley. — Results of Dredging. 73 



stance very brittle, easily flaking off. U in bos 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 nacre- 

 ous interior ; the surface has everywhere close-set grains 

 which develop mmute 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, 

 omm. ; length, 5-75 mm. 



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. 



Necera trailli, Hutton, Cat. Marine Mollusca of New Zea- 

 land, 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. 



Cuna delta, Tate and May. 



Carditella delta, Tate and May, Trans. Koy. Soc. S.A., xxiv, 

 1900, p. 102. Cuna delta, Hedley, Mem. Austr. Mus., 

 iv, 1902. p. 316. 

 Four separate valves. 



Venericardia lutea, Hutton. Plate I, fig. 6. 

 Cardita lutea, Hutton, Man. N.Z. Mollusca, 1880, p. 159^ 



The history of this species is complicated. Hutton applied 

 his name to the shell introduced by Deshayes (P.Z.S., 1852 

 (1854), p. 101) as Cardita Zealand ica, because that clashed 

 with Venericardia zealandica, Potiez and Michaud (Gal. des 

 Moil., li, 1841, p. 166). Glancing aside, I might here remark- 

 that the latter species appears to have been misunderstood by 

 all writers on the New Zealand Mollusca, and that the de- 

 scription of Potiez and Michaud is evidently meant for Chiove 

 stutchburyi, Gray. Finally, Hutton united (P.L.S.N.S.W., ix, 

 1884, p. 527) his C. lutea to the Chilian Cardita compressa, 

 Reeve. This identification I am unable to support. 



The species was a common one where we dredged. An 

 example selected for figuring is 7 mm. long and 8 mm. high. 



