224 128 
Raeta pulchella, ApAms & Reeve, Hiparco, Fauna malacol. de |. isl. Filipinas, I, p. 58, No. 119. 
Mactra rostralis, DesHAyES, Proc. Zool. Soc. London, XXII, 1854, p. 69, No. 32. 
REEVE, Conchol. icon., VIII, Mactra, Sp. 119. 
Raéta — — Dunker, Index molluscor. mar. Japon., 1882, p. 185. 
The sound of Koh Chang, 5 fathoms, soft clay (7/2). 
Long. 25 mm., alt. 17 mm. 
Distribution: — Borneo, Philippines, China, Japan (Yokohama). 
The specimen from Koh Chang is larger than the individuals which have 
hitherto been described (long. 20 mm., alt. 14 mm.); it bears a very strong resem- 
blance to the form taken by R. Sturany! at Ras Mallap in the Gulf of Suez in 50 
fathoms, which he names Raéta bracheon; how far this species is synonymous with 
R. pulchella, Ad. and Reeve, I am not prepared to say. Unfortunately, my material 
consists only of a solitary, broken, left valve, of which I give a figure for future 
comparison. 
Raéta anatinoides, Reeve. " 
Mactra Anatinoides, REEVE, Conchol. icon., VIII, 1854, Mactra, Sp. 123. 
The sound of Koh Chang, 3—5 fathoms, soft clay (‘/2, partially fragments ) 
N. of Koh Kong, 8 fathoms, mud (7/2). 
Long. 5—14 mm. (long. 14 mm., alt. 12 mm.). 
Distribution unknown. 
By comparisons in the British Museum, I have convinced myself that the 
specimens from the Gulf of Siam are really identical with R. anatinoides, Reeve, 
and not with R. pellicula, Desh., which, however, comes near to R. anatinoides, Reeve. 
Standella pellucida, Ch. 
Mactra pellucida, CuEmMNitz, Conchyl. Cabin., VI, 1782, p. 235, pl. 24, fig. 234. 
— = SPENGLER, Skrivter af Naturhistorie-Selskabet, V Bd., 2 H., 1802, p. 123, No. 29. 
- REEvE, Conchol. icon., VIII, Mactra, Sp. 118. 
— = WEINKAUFF in MARTINI u. CHEMNITZ, Conchyl. Cabin., XI Bd., 2 Abth., p. 17, 
No. 14, pl. 5, fig. 1. 2 
Standella — — Hipaico, Fauna malacol. de 1. isl. Filipin., Il, p.57, No. 117. 
— (Merope; pellucida, CHEMNITZ, MELvILL & STANDEN, Proc. Zool. Soc. London, 1906, p. 828. 
Mactra depressa, Lamarck, Hist. nat. d. anim. s. vert., V, 1818, p.479, No. 29. — éd.2, VI, p. 106, No. 29. 
Encyclop. méthod., II, 1830, p. 398. 
Coast of Lem Ngob (1 + */2). The strand off the Mangrove at the station on 
Koh Chang, quite shallow water (6). 
Long. 7—48 mm. 
Distribution: — Bombay, extending southwards to Ratnagiri (MELVILL & 
STANDEN). — Philippines. 
Metvi_L and ABERCROMBIE write that dead specimens of the present species 
are common at Bombay; the two right valves from Lem Ngob are also from dead 
individuals, all the other individuals, which are small, were taken alive. 
' R. Srurany, Lamellibranchiata d. Rothen Meeres. Wien 1899, p. 12, No. 10, pl. 3, figs. 1— 6. 
