15 111 



The norlhein side of Koh Mesan, 10—15 fathoms, stones (1). S. of Koh Chuen, 

 30 fathoms, shells (2). Between Koh Kul and Koh Kahdat, 10 fathoms, shells C^/j). 



Long. 8—23 mm. 



Distribution: — King Island, Mergui Archipel (E. v. Martens), Poulo Pcnang 

 (Mus. Calcutta), Bombay (Mus. Calcutta). — Amoy (Jousseaume). 



E.V.Martens' and Lamy refer this species to the subgenus Barhatia. But it 

 appears to me that it should be placed with Area (s. str.). Dunker has already 

 staled, that the species varies considerably in regard to form, and the specimens 

 from the Gulf of Siam, as well as Lamy's figure, entirely confirm this statement. 

 As the specimen figured by Dunker is rather monstrous I have thought it right lo 

 give a new figure of a typical specimen. 



Area (Barbatia) fusca, Brug. 



Area fusca, Biuiouikrr, Dictionn. encycl. method., I, 1792, p. 102, No. 10. 



— — — Encycl. method., pi. 308, fig. 5. 



— — — Lamahck, Anim. s. vertèbres, ed. 2, VI, p. 4fi6, No. 14. 



— — — Reeve, Conchol. icon, II, Area, Sp. 82. 



— (Barbatiai fusca. Brug., Martini u. Chemnitz, Coiichyl. Cabin., VIII, 2 Abth., p. 18, pi. 4, fig. 2 ; pi. G, 



figs. 5—6. 



— — — — P. Fi.scHER, Catal. d. Moll, de I'Indo-Chine, p. 214. 



— — — — Lamy, Jouni. de Conchyl., vol. 55, 1907, p. 53. 



— bicolorata, Chemnitz. Conchyl. Cabin.. XI, 1795. p. 243, pi. 204, fig. 2007. 



The northern side of Koh Chang, 1 fathom, coral blocks (2'rj). Koh Mak, sand 

 coast (V'l>). Koh Kahdat, 1 fathom, sand (1). 



Long. 12—33 mm. 



Distribution: — Singapore (The Danish Expedit, to Siam, 2 specimens, 2 — 3 

 fathoms, coral-reef), Mergui Isis., Nicobar Isis., Madras, Gulf of Manaar, Red Sea, 

 Seychelles, Madagascar, Mascarenes, Querimba Isis. — Poulo-Condor, Cochin China, 

 Philippines, Menlawei Isis., Celebes, Sulu Isis., Java, Small Sunda Isis., Moluccas, 

 Aru Isl., Sorong, Torres Strait, North, East and West Australia, Salomo Isis., Viti 

 Isis., Tonga Isis., Lifu Isl., New Caledonia, New Zealand. 



Lamy (loc. cit. p. 53) considers A. cruciata, Philippi and A. Rodatzi, Dunker 

 (from Zanzibar) to be synonymous with A. fusca, Brug. 



Area (Barbatia) complanata, Ch. 



(PI. 1, Figs. 5— 10). 



Area complanata, Chemnitz. Concliyl. Cabin., VII, 1784, p. 198, pi. 55, figs. 544- 45. 



L. MoRLET, .lourn. de Conchyl., vol.37, 1889. p. 162. 

 - (Barbatia) complanata, Chemnitz, P.Fischer, Catal. d. Moll, de I'lndo-Chine, p. 215. 

 Byssoarca decunsata, Sowerbv, Proc. Zool. Soc. London, vol.1, 1833, p. 18. 

 Area — — Reeve, Conchol. icon.. II. Area, Sp. 81. 



' The ,I(nirn:il of the Linnc.in Soc, vol. XXI, 1887, p. 207. 



