OF MERGUI AND ITS ARCHIPELAGO. 



215 



King Island, mud-banks exposed at spring-tide ; Laloon Bay, 

 Elphinstone Island. China. 



374. Semele (Amphidesma) vestalis, Adams, Reeve, Conch. 

 Icon. viii. Amphidesma, pi. vi. fig. 38. 



King Island. China Sea. 



375. Mesodesma (Paphia) glabratum, Lam. Encycl. Meih. 

 pi. 257. fig. 3 ; Reeve, I. c. viii. pi. iii. fig. 20. 



King Island and Owen Island, sand. Red Sea, Mauritius, 

 Mozambique, Seychelles, Salang, Singapore, Philippines, Aus- 

 tralia. 



376. Mesodesma ^qlilatertjm, IE. Roemer, Malakozoologische 

 Blatter, 1862, p. 136. (PL XVI. fig. 6 a, h.) Testa transverse 

 oblonga, subaequilatera, concentrice striatula, periostraco fulvo 

 tecta, extremitate utraque rotundata, margine ventrali recto, 

 antico paulum magis ascendente, verticibus in |— J longitudinis 

 sitis, sinu palliari usque in mediam fere testam elongato. Long. 

 38, alt. 20j, crass. 12 millim. 



King Island, beneath stones at highest water-mark ; Elphin- 

 stone Island ; Allen Island. Salang. 



377. Mesodesma (Dayila) planum, Hanley, Reeve, I. c. fig. 16. 

 Elphinstone Island ; Owen Island, sand. Philippines. 



378. Mesodesma (Dayila) CRASsuLUM,_DesA.,.Zfeeye,Z.c. fig. 26. 



Very near the preceding, of about the same triangular out- 

 line, but not so very flat, and marked with a pale reddish median 

 ray in white ; whereas M. planum is uniformly horn-coloured. 



Elphinstone Island f. 



379. Tellina perplexa, Hanley, Proc. Zool. Soc. 1844, p. 149 ; 

 Roemer, Monogr. Tellina in Kiister's Conch-Cab. pi. 14. figs. 4-6. 



T. ostracea (Lam. ?), Hanley, Reeve, Conch. Icon. xvii. fig. 124, 

 is scarcely different, but comparatively a little shorter behind. 

 Also T. siamensis, Martens, Proc. Zool. Soc. 1860, p. 20, is 

 nearly allied, but larger, with more horizontal dorsal margins. 



King Island; Sullivan Island, 4 fathoms. Seychelles, Ceylon, 

 (Siam), Philippines, Moluccas. 



380. Tellina (Arcopagia ?) casta, Hanley, Reeve, loc. cit. 

 xvii. pi. xlvi. fig. 269. 



Allied to the European T, balaustina, L., but purely white. 

 Sullivan Island, 7 fathoms. Singapore. 



