20' 



Distribution: — M. {A.) striata has a wide range of distribution in the Indo-Pacific and 

 bas also been recorded from the Red Sea. 



In the "Siboga" collection it is represented by a young shell from the Bay of Bima (St. 47). 



Family Mactridae. 



Genus Mactra Linn. 



1767. Mactra Linnaeus, Syst. Nat., (éd. XII), p. 1125. 



'iyji. Trigonella Da Costa, Brit. Conch., p. 196. 



1856. Trigonella and Mactra Adams, H. & A., Gen. Rec. MolL, II, pp. 375, 379. 



1887. Mactra Fischer, P., Man. Conchyliol., p. 11 15. 



1894. Mactra Dali, Proc. Malacol. Soc. London, I, p. 211. 



1898. Mactra Dali, Trans. Wagner Free Inst. Sci. Philadelphia, III, p. 874. 



1917. Mactra Lamy, Journ. Conchyliol., LXIII, p. 176. 



1930. Mactra Stewart, Spécial Publication Acad. Nat. Sci. Philadelphia, N" 3, p. 206. 



For discussion as to the Génotype of Mactra référence may be made to Stewart's work 

 cited above. I, however, do not agrée with his view that Fleming's advertisement "In the 

 restricted genus Mactra^ as represented by M. saltorum of Linnaeus" constitutes a type 

 désignation, for Linnaeus did not describe any species under the name Mactra saltorum. 



The génotype is Mactra $tultorttm Linn., which is now generally regarded as a variety 

 of M. corallinum Linn. 



The other two subgenera represented in the "Siboga" collection 2S& Mactrotoma Dall^) — 

 type Mactra [Mactrotoma) fragilis Gmelin and Mactrinula Gray ^) type Mactra {Mactrimild) 

 plicataria La m. 



I. Mactra [Mactra) maculata (Gmelin). 



1782. Mactra maculata Chemnitz, Conch-Cab., VI, pp. 208, 217, pi. XXI, figs. 208, 209. 



1788. Mactra maculata Schroter, Conch.-Cab. Namen Reg., p. 60. 



1790. Mactra maculata Gmelin, Syst. Nat., (éd. XIII), p. 3260. 



1797. Bruguière, Encyclopéd. Méthod., pi. CCLIV, figs. -i^a, b. 



1798. Mactra maculata Rôding, Mus. Boltenianum, p. 169. 

 1802. Mactra maculata Spengler, Skrivt. Nat. Selsk., V, p. lio. 

 1802. Mactra maculata Bosc, Hist. Nat. Coq., III, p. 113. 



18 17. Mactra maculata Dillwyn, Descr. Cat., I, p. 134. 



18 18. Mactra maculata and M. sqiialida Lamarck, Anim. sans Vertèb., V, pp. 476, 478. 

 1822. Mactra maculata and M. squalida Blainville, Dict. Sci. Nat., XXVII, p. 545. 



1824. Mactra maculata and M. squalida Dubois, Epitome, p. 46. 



1825. Mactra maculata Wood, Ind. Test., p. 29, pi. VI, fig. 7. 

 1825. Mactra maculata Sowerby, Cat. Tankerville, p. 7. 



1833. Mactra setosa Quoy & Gaimard, Voy. "Astrolabe", III, p. 519, pi. LXXXIII, figs. 3,4. 



1835. Mactra maculata and M. squalida Deshayes in Lamarck, Anim. sans Vertèb., VI, pp. 102, 105. 



1837. Mactra maculata Gray, Mag. Nat. Hist., I, p. 371. 



1843. Mactra Maculata and M. Squalida Hanley, Rec. Biv. Shells, pp. 30, 31, pi. XI, fig. 30. 



1845. Mactra maculata and M. squalida Catlow & Reeve, Conch. Nomencl., p. 14. 



1) Dall, W. h. — Nautilus, VIII, p. 26 (1894). 



2) Gray, J. E. — Ann. Mag. Nat. Hist., (2) XI, p. 41 (1853). 



