248 152 



Koh Kram, 30 fathoms ('/s). North side of Koh Mesan, 10—15 fathoms, 

 stones (2). Koh Chueii, 10—15 fathoms (Va). 



Long. 10 — 29 mm. 



Distribution: — Ceylon and Gulf of Manaar, Huluki Isl. (Maldive Arcliip.). 

 — Philippines, Japan, Torres Strait, North and East Au.stralia, Funafuti (Ellice 

 Isis.), Mangsi Isl., Sooloo-Sea. 



The present species is recorded (with doubt) from Mauritius and Cargados, 

 and probably erroneously by J. G. Cooper from California. 



I doubt whether Chione embrithes, Melvill and Standen, ' can be maintained 

 as a distinct species. 



Dosinia trigona, Reeve. 



Artemis trigona, Reeve, Conchol. icon., VI, 18.50, Artemis, Sp. 4'2. 



Cythercea — — Soweuby, Thesaurus Conchyl., II, p. 033, pi. 133, fig. 120. 



Artemis — _ _ loc. cit., II, p. O,");), pi. 141, fig. 2U. 



Dosinia — — Römer, Monographie d. Molluskengatt. Dosinia, 186'2, p. 20, pl. 4, fig. 5. 



The strand off the Mangrove at the station on Koh Chang (2). Coast of Lem 

 Ngob (-'/a). 



Long. 20—39 mm. 



Long. 35 mm., alt. 37 mm., crass. 27 mm. 

 — 31 mm., — 32 mm., — 20 mm. 



Distribution: — Gulf of Manaar (Thurston). 



Reeve's statement (repeated by Deshayes, Sowerry, Römer and others) that 

 this species was found in the Red Sea has not hitherto been confirmed. 



Dosinia laminata, Reeve. 



Artemis laminata. Reeve, Conchol. icon., VI, 1850, Ailemis, Sp. 41. 



— — — SowEiiBY, Thesaur. Conchyl., II, p. 674, No. 71, pl. 144, figs. 80 — 87. 



Dosinia — — Römer, Monogr. d. Moll. Dosinia, 1862, p. 62, No. 72, pi. 16, fig. 2; pl. 10, fig. 3. 



— — — Martini u. Chemnitz, Conchyl. Cahin., XI, 1 Abth., p. 104, pl. 26, figs. 10 — 12. 



— — — Hidalgo, Obras raalacologicas, I, tom. II, 1903, p. 305, No. 398. 



Off Tung Kaben, 6 fathoms, mud mixed with clay (1). W. of Koh Chang, 

 20 fathoms, mud (2). S. of Koh Kahdat, 8-10 fathoms, mud (5). Koh Kahdat, 

 1 — 5 fathoms, sand (1). Between Koh Kut and Koh Kahdat, G— 10 fathoms, clay 

 and sand (2 + »/2). S. of Koh Mak, 5-6 fathoms (1). East of Koh Mak, 20 fathoms, 

 mud (3 + 1/2). W. of Koh Kut, 15 fathoms, mud (20). 



Long. I'/a- 34 mm. (Long. 34 mm., alt. 34 mm., crass. 18 mm.). 



Distribution: — Andamans, Red Sea (pleistocene). — Philippines, China, 

 Japan. 



Almost all the individuals from the Gulf of Siam were full of clay between 

 the transverse ribs owing to the clayey soil in which they had been living. 



' Journal of the Linnean Society, Zoology, vol. XXVII, p. 195. 



