166 
Cypricardia rostrata, LAMAncK, Hist. nat. d. anim. s. vert., VI, 1819, p. 28, No. 3. 
Trapezium rostralum, — 
Koh Kahdat, 1 fathom, sand (2). 
Long. 11—26 mm. 
70 
éd. 2, VI, 1835, p. 439, 
No, 3. 
Reeve, Conchol. icon., I, 1848, Cypricardia, Sp. 3. 
Dunker, Index molluscor. mar. Japon., 1882, p. 210. 
Koh Mak, sandy coast ('/2). 
Distribution: — Andamans, Madagascar, Mauritius, Ile S' Marie, Natal, Durban. 
— Philippines, Japan, Aru Isl., Torres Str., Port Denison, Kangaroo Isl. (New Hol- 
land), New Caledonia, Boston Isl., Viti Isl. 
All the specimens from the Gulf of Siam belong to the form rostrata, Lam. 
Trapezium vellicatum, Reeve. 
Cypricardia vellicata, Rezve, Proc. Zool. Soc. London, 1848, p. 195. 
Trapezium vellicatum,  -— 
Libitina vellicata, _ 
Cypricardia vellicala, 
Libitina 
Coast of Lem Ngob, shallow water, stones (29). 
Conchol. icon., I, 1848, Cypricardia, Sp. 7. 
Dunken, Index moll. mar. Japon., 1882, p. 210. . 
var., EpG. Smirn in Zoolog. Collect. of H. M. S. “Alert,” Lond. 1884, p. 97, 
No. 21. 
Metviti & SyKes, Proc. Malacol. Soc. London, III, 1898, p. 48. 
Hiparco, Fauna malacol. de |. Isl. Filipin., H, 1903, p. 367, No. 463. 
DaurzenBeRG & Fiscuer, Journ. de Conchyl., vol. 53, 1905, p. 213. 
Gulf of Klong Salakpat (4). 
Koh Chang, shallow water, stones (5). 
Long. 7—30 mm. 
Distribution: — Mergui Archip., Andamans, Bombay, Karachi, Persian 
Gulf. — Philippines, Tonkin, China, Japan, North Australia (Port Darwin), East 
Australia (Port Curtis). 
In all the specimens from the Gulf of Siam the valves, upon their exterior 
and interior, are quite white without rays or coloration at the posterior end (in 
some of the specimens the umbones are purplish-brown). Similar forms have 
been recorded from the Philippines (Cumina), Japan (DUNKER), and North Australia 
(COPPINGER). 
Coralliophaga coralliophaga, Chemn. 
Chama coralliophaga, Cuemnirz, Conchyl. Cabin., X, 1788, p. 359, pl. 172, figs. 1673—74. 
GMELIN, Syst. Nat., ed. XIII, 1790, p. 3305, Nr. 25. 
Gein, Lamarck, Hist. nat. d. anim. s. vert., VI, I, 1819, p. 28, No. 4. — éd. 2, VI, 
p. 439, No. 4. 
— Lamarck, REEVE, Conchol. icon., I, 1843, Cypricardia, Sp. 12. 
Coralliophaga coralliophaga, GmMevin, H. & A. Abas, Geriera of recent Mollusca. pl. 109, fig. 6. 
Cypricardia -— Cuemnirz, LiscuKé, Japan. Meeres-Conchyl., IH, p. 140. 
Lithophagella, - — v. Martens, Journ. Linn. Soc.; Zool., vol. 21, 1887, p. 214, No. 372. 
Gmewin, VeRRILL and Busu, Trans. Connecticut Acad., X, 1900, p. 520, pl. 63, 
figs. 9—10. 
Cuemnirz, Hiparco, Fauna malacol. d. las isl. Filipinas, II, 19038, p. 369, 
No. 467. 
Cardita dactylus, BruGuizre, Encyclop. méthod. Vers., 1, 1792, p. 412, No. 13. 
Coralliophaga dactylus, BruGuizre, Morcu, Catal. conchyl. que reliq. Yoldi, II, p.19, No. 199. 
Cypricardia - 
Coralliophaga 
