OF MERGTJI AND ITS ARCHIPELAGO. 



217 



389. Mactra attentjata, Desk., Reeve, I.e. viii. pi. xviii. fig. 97. 

 Very inequilateral ; outline like that of some species of Venus. 

 Elpbinstone Island. Madras. 



390. Mactra (Mactrenula) angulifera, Desh., Reeve, I. c. 

 viii. pi. xvi. fig. 83. 



Sullivan Island, 2-7 fathoms ; Owen Island, sand. Phi- 

 lippines. 



391. Lutraria (Merope) nicobarica, Gmelin. (PI. XYI. 

 fig. 7 a, I.) 



Mactra rugosa Indiae orientals, Chemnitz, Conch.-Cab. vol. vi. p. 238, 

 pi. 24. fig. 237. 



Mya nicobarica, Gmelin, Linne, Syst. Nat. ed. 13, p. 3221. 



Mactra reticulata, Spengler, Skrivter af Naturhist. Selskab. Copenhagen, 

 vol. v. pt. 2, 1802, p. 119. 



Lutraria Chemnitzii, Philippi, Zeitschrift fur Malakozoologie,v. 1849, 

 p. 26. 



Testa ovato-oblonga, tenui, stramineo-albida, costulis radianti- 

 bus numerosis, interstitia non sequantibus excavata, extremitate 

 utraque rotundata, antica altiore, costulis obsolescentibus, postica 

 striis capillaribus obliquis sculpta ; verticibus ad f- longitudinis 

 sitis. Long. 27 millim., alt. 18, crass. 10. 



Very near L. cegyptiaca (Chemnitz ?), Hanley, Reeve, Conch. 

 Icon. viii. Mactra, fig. 112, and L. capillacea, Desh., Reeve, I. c. 

 Mactra, fig. 117 ; but distinctly less inequilateral. This species 

 attains a larger size than above indicated, a specimen in the Berlin 

 Museum, locality unknown, being 44 millim. long and 29 high. 



King Island, mud-bank exposed at spring-tide. Nicobars. 



Lutraria elo^gata, Gray. See before, p. 174, no. 68. 



Corbulid^;. 



392. Corbula tunicata, Hinds, Voy. of the ''Sulphur,' Zool. 

 pi. 20. fig. 45 ; Reeve, I. c. ii. pi. i. fig. 5. 



Hinder part produced into a narrow beak. 

 Sullivan Island, 7-10 fathoms. Agulhas Bank, Macassar, 

 Philippines. 



393. Corbtjla crassa, Hinds, he. cit. pi. 20. figs. 1-3 ; Reeve, 

 Conch. Icon. ii. pi. i. fig. 8. 



Very near the preceding, but the hinder extremity more 

 rounded. 



Owen Island. Malacca, Philippines. 



