220 124 
“am. Mactridae. 
Mactra (Trigonella) achatina, Ch. 
Mactra achaltina, CuEemnirz, Conchyl. Cabin., XI, 1795, p. 218, pl. 200, figs. 1957 —58. 
= — — REEVE, Conchol. icon., VIII, Mactra, Sp. 51. ? 
a — “= WEINKAUFF in MARTINI u. CHEMNITZ, Conchyl. Cabin., XI Bd., 2 Abth., p. 50, 
No. 49, pl. 17, figs. 3—4. 
~_ — -— Epc. Smirn, Lamellibranchiata of the Challenger Exped., p. 59. 
- Crosse et Fiscuer, Journ. de Conchyl., vol. 40, 1892, p. 76, No. 24. 
-- maculosa, LAMARCK, Hist. nat. d. anim. s. vert., V, 1818, p.474, No. 8. — éd. 2, VI, p. 100, No. 8. 
— ornata, Gray, The Magaz. of Nat. Hist., I, 1837, p. 371. 
— — Reeve, Conchol. icon., VIII, Mactra, Sp. 58. 
_ — —  WernkauFF in Martini u. CHemnirz, Conchyl. Cabin., XI Bd., 2 Abth., p. 37, No. 35, 
pl. 12, figs. 1—3. ‘ 
— adspersa, Dunker, Zeitschr. f. Malakozoologie 1848, p. 186, No, 20. — Puixippr, Abbild. u. Beschreib., 
Ill, p. 135, Mactra, pl. 3, fig. 2. 
Koh Kahdat (several young individuals). 
Gulf of Siam, west coast of Cambodge (Pavte). 
Distribution: — Singapore (shallow water, Sy. Gab), Nicobars, Andamans, 
Tranquebar, Ceylon, Angrias Bank (MELvILL and STANDEN), Persian Gulf, Aden, 
Red Sea, Suez, “South Africa” (SowEerBy). — Philippines, China, Japan, Torres Strait, 
Admiralty Isl. 
Mactra (Trigonella) maculata, Ch. 
Mactra maculata, CHremMnitz, Conchyl. Cabin., VI, 1782, p. 217, pl. 21, figs. 208—9. 
— Reeve, Conchol. icon., VIII, Mactra, Sp. 56. 
= —= - WEINKAUFF in Martini u. CHEMNITZ, Conchyl. Cabin., XI Bd., 2 Abth., p. 10, 
No.7, pl. 3, figs. 4—5; pl. 16. figs. 5—6. 
= — — HipauGo, Fauna malacol. de |. isl. Filipinas, IH, p. 48, No. 100. 
— squalida, Lamarck, Hist. nat. d. anim. s. vert., V, 1818, p. 478, No. 26. — éd. 2, VI, p. 105, No. 26. 
-- —- Haney, Catal. of rec. biv. shells, p. 31, pl. 11, fig. 30. 
- setosa, Quoy, Voyage de l’Astrolabe, Zoologie, III, 1833, p.519, pl. 83, figs. 3—4. 
Reevei, DrsHayes, Proc. Zool. Soc. London, XXI, 1853, p. 15, No. 3. 
— Reeve, Conchol. icon., VIII, Mactra, Sp. 85. 
— WerNKAUFF in Martini u. CHEMNITZ, Conchyl. Cabin., XI Bd., 2 Abth., p. 66, 
No. 67, pl. 23, fig. 4. 
= Moret, Journ. de Conchyl., vol. 37, 1889, p. 172, No. 88. 
Islands in the Gulf of Siam (L. Morter). 
The Danish Expedition to Siam collected no specimens of this species. 
Distribution: — Nicobars. — Philippines, Loo Choo Isls. (Yaeyama), Amboina, 
Sorong, Sulu Isls., Mast Head Reef (Queensland), New Caledonia, Vanikoro Isl., 
Pelew Isls. 
Mactra (Trigonella) cuneata, Ch. 
(Pl. IV, Figs. 17—19). 
Mactra cuneata, Curmnirz, Conchyl. Cabin., VI, 1782, p. 221, pl. 22, fig. 215. 
— GMELIN, Syst. Nat., ed. XIII, 1790, p. 3260, No. 19. 
— - Reeve, Conchol. icon., VIII, 1854, Mactra, Sp. 109. 
