161 257 
Long. 8—35 mm. 
Pavie in 1884 took it at the islands in the Gulf of Siam (Moret, Journ. de 
Conchyl., vol. 37, p. 168). 
Distribution: — “Bangkok” (DauTzENBERG),! Bay of Bengal, Ceylon, Arabian 
Sea, Persian Gulf, Gulf of Aden, Red Sea, Suez Canal, Madagascar and Rodriguez, 
Mozambique and Zanzibar, Natal (SowErRBy), Malay Archip. (the most commonly 
occurring species, v. MARTENS), Philippines, north and east coasts of Australia. 
Card. Dupuchense, Reeve, is recorded to have been taken at the “Island of Dupuch, 
Torres Straits (found on the reefs at low water); Dring, H. M.S. Beagle.’ MEtviLi 
& StanpDEN* do not record it from Torres Strait, but C. ruagosum, Lam. is recorded 
from “Boydong Cays.” Ep. ROMER® regards, and undoubtedly correctly, C. Dupuchense, 
Reeve, as a variety of C. flavum. 
Cardium (Trachycardium) impolitum, Sow. 
Cardium impolitum, G. B. Sowersy, Proc. Zool. Soc. London, 1840, p. 107. 
= — — Conchol. Illustr., Sp. 49, figs. 6 and 66. 
= — — REEVE, Conchol. icon., Il, Cardium, Sp. 80. 
= — — MarTINI u. CHEMNitTz, Conchyl. Cabin., X, 2 Abth., p. 62, pl. XI, fig. 12. 
Koh Chuen, 30 fathoms (1). Between Koh Kut and Koh Kahdat, 10 fathoms, 
shells (‘/2). Between Koh Mesan and Cape Liant, 5—9 fathoms ('/2). 
Long. 10 mm., alt. 12 mm. (long. 27 mm., alt. 83 mm.). 
Distribution: — Karachi (MELviLL & STANDEN). — China (Sowersy), Tahiti 
(FRAUENFELD). 
Cardium (Trachycardium) arenicola, Reeve. 
Cardium arenicolum, REEyrE, Conchol. icon., II, 1843, Cardium, Sp. 78. 
— arenicola, — LiscHkE, Japanische Meeres Conchyl., II, p. 125. 
_ maculosum, SowERBy, Conchol. llustr., Sp. 48, fig. 63 (non Woop). 
Koh Kram 20—30 fathoms (2 + 1/2). Around Koh Mesan and Koh Chuen, 
5—838 fathoms, stones and shells (8). Koh Kahdat, 1—2 fathoms ('/2). 
Long. 3 mm., alt. 3°55 mm. (long. 32 mm., alt. 38 mm.). 
Distribution: — Red Sea (Srurany). — Philippines (Cumina), Nagasaki 
(LiscHKE). 
The specimens from the Gulf of Siam have about 52—55 ribs, and as REEVE 
for his species states only 46 ribs, I thought, at first, that the specimens were per- 
haps Card. transcendens, Melvill & Standen,' in which species there are 58 ribs. But 
J. Cosmo Mervitt, to whom I sent a few specimens, kindly tells me that they 
1 According to a written communication from Pu. DauTzENBERG these specimens must most 
properly be referred to C. Dupuchense = pectiniforme, Born. The locality “Bangkok” is certainly 
due to a mistake. 
* Journ. Linnean Soe. Zool., vol. XXVII, p. 191. 
8 Martini u. CHEMNITZ, Conchyl. Cabin., Cardiacea, p. 58. 
* Journal of the Linnean Soc., Zoology, vol. 27, 1899, p.199, pl. 11, fig. 21. 
D. K. D. Vidensk. Selsk. Skr., 7. Reekke, naturvidensk. og math. Afd. V. 3. 33 
