THE MOLLUSCA HEDLEY. 495 



This species is employed on Funafuti in the manufacture of 

 fish-hooks (ante p. 268). I purchased a valve from a native on 

 Nukulailai. 



Cuming procured the type at Marutea, Paumotus. 



MELINA SAMOENSIS, Baird. 



Baird, in Brenchley, Cruise of the " Cura^oa," 1873, p. 451, pi. 

 xlii., fig. 8. 



Common ;, attached to the under surfaces of coral blocks on the 

 ocean beach of Funafuti, at low water. My specimens exceed 

 the type in size, being upwards of 50 mm. in length. 



T suspect that the prior P. linguceformis, Reeve, from the 

 Society Islands, is but a depauperated form of this. The 

 "Challenger" collected M. samoensis on the reefs at Honolulu 

 and Hawaii ; the type came from Tutuila, Samoa. 



Both Meek and Dall have pointed out* that the name of Perna 

 must be superseded by that of Melina. 



PINNA, pp. 



Some fragments of a Pinna, perhaps P. triyonalis, Pease, were 

 seen on the lagoon beach of Funafuti. 



OSTREA HANLEYANA, Soiverby. 



Sowerby, Conch. Icon , xviii., 1871, Ostrea, PI. xxviii., sp. 72. 



An oyster which occurred under stones beside M. samoensis is 

 with much doubt so identified. 



OSTREA CRISTAGALLI, Linne. 

 Sowerby, loc. cit., pi. xi., sp. 22. 



Obtained in eighteen fathoms, three miles south-west of the 

 village (ante p. 328). 



I collected this at Port Moresby, British New Guinea. It is 

 represented in this Museum from Florida, Solomons ; Havammh 

 Harbour, New Hebrides ; and Ouvea, Loyalties. 



CARDITA SWEETI, sp. nov. 



(Fig. 50). 



Shell solid, oblong, slightly oblique, inequilateral, little inflated. 

 Colour dull white, upon the beak pale yellow. Sculptured by 

 about forty-five close, raised, radiating ribs, separated by drep 

 interstices a quarter of their width. In the median area the 

 rays are smaller and closer together than at the sides, while 

 at the extremities they rapidly enlarge and rather recurve. Upon 



* Meek Report U.S. Geol. Survey Territories, ix., 1870, p. 28, note; 

 Dall Trans. Wagner Free Inst. Sci., iii., 1898, p. G05. 



