220 124 



Farn. Mactridae. 



Mactra (Trigonella) achatina, Ch. 



Mactra achatina, Chemnitz, Coiichyl. Cabin., XI, 1795, p. 218, pi. 20U, figs. 1957 -58. 



— — — Reeve, Conchol. icon., VIII, Mactra, Sp. 51. 



— — — Weinkauff in Martini u. Chemnitz, Conchyl. Cabin., XI Bd., 2 Abtli., p. 50, 



No. 49, pi. 17, figs. 3— 4. 



— — — Edg. Smith, Lamellibranchiata of the Challenger Exped., p. 59. 



— — — Crosse et Fischer, Journ. de Concliyl., 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. lOU, No. 8. 



— ornata. Gray, The Magaz. of Nat. Hist., I, 1837, p. 371. 



— — — Reeve, Conchol. icon., VIII, Mactra, Sp. 58. 



— — — Weinkauff in Martini u. Chemnitz, Conchyl. Cabin., XI Bd., 2 Abth., p. 37, No. 35, 



pi. 12, figs. 1—3. 



— adspersa, Dunker, Zeitschr. f. Malakozoologie 1848, p. 180, No. 20. — Philiimm, Abbild, u. Rcschrcib., 



Ill, p. 135, Mactra, pi. 3, fig. 2. 



Koh Kalidat (several young individuals). 



Gulf of Siam, west coast of Cambodge (Pavie). 



Distribution: — Singapore (shallow water, Sv. Gad), Nicobars, Andamans, 

 Tranquebar, Ceylon, Angrias Bank (Melvill and Standen), Persian Gulf, Aden, 

 Red Sea, Suez, "South Africa" (Sowerby). — Philippines, China, Japan, Torres Strait, 

 Admiralty Isl. 



Mactra (Trigonella) maculata, Ch. 



Mactra maculata, Chemnitz, Conchyl. Cabin.. VI, 1782, p. 217, pi. 21, figs. 208-9. 



— — — Reeve, Conchol. icon., VIII, Mactra, Sp. 56. 



— — — Weinkauff in Martini u. Chemnitz, Conchyl. Cabin., XI lid., 2 Abth., p. 10, 



No. 7, pi. 3, figs. 4-5; pi. 16. figs. 5— 6. 



— — — Hidalgo, Fauna malacol. de I. isl. Filipinas, II, 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. 



— — — Hanlev, Catal. of rec. biv. shells, p. 31, pi. 11, fig. 30. 



— setosa, QuoY, Voyage de l'Astrolabe, Zoologie, III, 1833, p. 519, pi. 83, figs. 3-4. 



— Reeoei, Deshayes, Proc. Zool. Soc. London, XXI, 1853, p. 15, No. 3. 



— — — Reeve, Conchol. icon., VIII, Mactra, Sp. 85. 



— — — Weinkauff in Martini u. Chemnitz, Conchyl. Cabin., XI Bd., 2 Abth., p. 66, 



No. 67, pi 23, fig. 4. 



— — — MORLET, Journ. de Conchyl., vol.37, 1889, p. 172, No. 88. 



Islands in the Gulf of Siam (L. Morlet). 



The Danish Expedition to Siam collected no specimens of this species. 



Distribution:— Nicobars. — Philippines, Loo Choo Isis. (Yaeyama), Amboina, 

 Sorong, Sulu Isis., Mast Head Reef (Queensland), New Caledonia, Vanikoro Isl., 

 Pelew Isis. 



Mactra (Trigonella) cuneata, Ch. 



(PI. IV, Figs. 17—19). 



Mactra cuneata, Chemnitz, Conchyl. Cabin., VI, 1782, p. 221, pi. 22, fig. 215. 



— — — Gmelin, Syst. Nat., ed. XIII, 1790, p. 3260, No. 19. 



— — - Reeve, Conchol. icon., VIII, 1854, Mactra, Sp. 109. 



