Hedlky. — Results of Dredging. 75 



height, more solid, and with stronger concentric sulci. I 

 believe the two to be variants of one species. 



The New Zealand shell was named for me by Mr. H. 

 Suter, for whom in turn it was determined by Dr. W. H. Dall, 

 probably from co-types distributed by Hugh Cuming. The 

 occurrence of the species in space and literature induces me to 

 suspect an error parallel to that of Leda fastiaiosa, and to 

 conjecture that it did not come from the Philippines, but 

 that it was originally dredged in New Zealand waters by 

 F. Strange during the cruise of H.M.S. " Acheron " in 1849. 



It has been detected by Mr. R. Murdoch in the Tertiary 

 beds of Wanganui. 



Cardium pulchellum, Gray. 

 Gardium pulchellmn, Gray, Dieffenbach's New Zealand, ii, 

 1843, p. 252. Id., Reeve, Conch. Icon., ii, 1844, pi. viii, 

 fig. 42? 



Single and broken valves were dredged in plenty. 



Mactra scalpellum, Reeve. 

 Mactra scalpellum, Reeve, Conch. Icon., viii, Mactra, pi. xix, 

 fig. 106, Mav, 1854. Id., Deshayes, Proc. Zool. Soc, 1854, 

 p. 65, Feb. 10, 1855. 



Several odd valves. 



The species should be credited to Reeve, not, as is usual, 

 to Deshayes, for the publication by Reeve was earlier by 

 nearly a year. 



Corbula zelandica, Quoy and Gaimard. 

 Gorbula zelandica, Quoy and Gaimard, Voy. " Astrolabe," 

 Zool., iii, 1835, p. 511, pi. 85, figs. 12-14. 

 A single valve. The type of the species was obtained in 

 the Hauraki Guif near by. 



C. erythrodon, Laink., is a much larger shell, differing in 

 form and colour. It has been recognised by Lischke (Jap. 

 Meers Conch., 1, 1869, p. 136) as a Japanese species, and 

 ought, I think, to be struck off the New Zealand list. 



Pteropoda. 

 This groun is included here for convenience. As Pelseneer 

 has demonstrated, they properly belong to Gastropoda. 



Cavolinia tridentata, Forskal. 

 Anomia tridentata-, Forskal, Descrip. Anim., 1773, p. 124. 

 Cavolinia tridentata, Pelseneer, Chall. Rep., Zool., xxin. 

 1888, p. 83. 

 A few specimens. 

 This species is an addition to the New Zealand fauna. 



