165 261 



Distribution:— Singapore, Mergui A rchip., Nicobars, Madras, Ceylon, Mauritius. 

 — Poulo Condor, Cochin China, Philippines, Moluccas, Java, Malay Archip., New Guinea, 

 Torres Str., Port Molle (Queensland), West Australia, Lifu Isl., Salomon Isis., Viti Isis. 



The Danish Expedition obtained only quite small specimens of this species 

 from the Gulf of Siam. Mr. Ph. Dautzknberg writes to me that his Hemicard. tegulatum ' 

 must be regarded as a variety of Hemicard. unedo L. 



Hemicardium (Fragum) fragum L. 



Pl.V, Fig. 20). 



Cardiiim fragum. Linné, Syst. Nat., ed. X, 1758, p. 679, No. (i7. — ed. XII, p. 1123, No. 83. 



— — — Mus. Ludov. Ulricæ reg., p. 488, No. 39. 



— — — Reeve, Conchol. icon., II, Cardium, Sp. 23. 



— — — Martini u. Chemnitz. Conchyl. Cabin., X, 2 Abtli.. p. 1U5, pi. 4, figs. 9 — 10. 



Between Koh Kahdat and Koh Kut, 6 fathoms, clay mixed with sand ('2). 

 Koh Kahdat at the strand, numerous specimens. Koh Mak, sandy coast ('/s). 



Long. 4—10 mm. 



Distribution:— Andamans, Nicobars, Gulf of Tadjourah, Mauritius, east 

 coast of Africa, Querimba Isis. — China Sea, Philippines, Amboina, Java, Borneo, 

 Sulu Isis., Liukiu Isis., Torres Strait, Port Curtis and Mast Head Reef (Queensland), 

 New Zealand, New Caledonia, Gilbert Isis., Funafuti (EUice Isis.), Paumotu Isis. 



The specimens which have been obtained are all very small. According to 

 O. FiNSCH this species is used as food in the Gilbert Islands. Several specimens of 

 a peculiar variety (var. carjna/a m.), with a decidedly prominent keel extending from 

 the umbo down towards the hinder angle of the ventral side, produced by the strong" 

 development of the two ribs at that place, have been taken on the strand of Koh 

 Kahdat and at Koh Chang; this variety is figured on Pl.V, Fig. 20. 



Hemicardium (Fragum) carditaeforme, Reeve. 



(Pl.V, Figs. 21-22). 

 Cardium Carditœforme, Reeve, Conchol. icon., II, Cardium, Sp. 127. 



Between Koh Mesan and Koh Chuen, 15 — 38 fathoms, stones with shells (7). 

 Koh Chuen, 10 — 15 fathoms (1). Between Koh Mesan and Cape Liant, 5 — 9 fathoms, 

 sand CI2). Strand of Koh Kahdat ('/:;). West of Koh Kong, 10—15 fathoms (1). 



Long. 4—9 mm. 



Distribution:— Andamans, Gulf of Suez ("rare" M'Andrew, Cooke). 



As the figure by Reeve is not good, I give a new figure of the species. 



Hemicardium (Ctenocardium) fornicatum, Sow. 



Cardium fornicatum, Sowerby, Proc. Zool. Soc. London, 1840, p. 110. 



— — — Conchol. Illustr., Sp. 84, fig. 50. 



— — — Reeve, Concliol. icon., II, Cardium, Sp. 110. 



' Journal de Conchyliologie, vol. 48, 1900, p. 5. 



