155 251 



"Iles du golfe de Siam" (L. iMüui.ktI. 



Distribution: — New Guinea, North and North-west Australia. 



This species does not occur among the material brought home by the Danish 

 Expedition to Siam, and Dautzenberg and Fischer think' that probably it is 

 Dosinia Gruneri, Phil., which Morlet records from the Islands in the Gulf of Siam 

 under the name of U. contusa. Reeve. 



Dosinia pubescens, Phil. 



Cylherea {Artemis) pubescens, Philipim, .\l)bild. a. 15eschieil). neuer od. wenig gekannt. Conchyl., Ill, 1847 



(1851), p. 24 (36), pi. 8, fig. 3. 

 Artemis puljescens, Phimppi, Süwerby, Thesaurus Conchyl., II, p. 672, No. 64, pi. 143, fig. 72. 

 Dosinia — — Römer, Monogr. d. Moll. Dosinia, p. 7!l, No. 96, pi. 15, fig. 1. 



Koh Kahdal, 1 — 5 fathoms, sand (1). North of Koh Kahdat, 4—5 fathoms, 

 coarse sand ('j). Koh Mak, sandy coast ('-■). West of Koh Kut, 30 fathoms, sand 

 and mud ('/ä). 



Long. 5 — ^20 mm. 



Distribution: — Bombay, Mekran Coast, Aden, Madagascar, Durban. — 

 Philippines, Labuan (N. Borneo), New Holland. 



All the specimens from the Gulf of Siam are young, and the lamellæ which 

 limit the convex area are therefore not so well-developed as in older individuals. 

 In one of the specimens from Koh Kahdat the apices are red and the umbones 

 are ornamented with reddish-brown zig-zag lines and spots. Melvill and Abeh- 

 crombie- say also "Young specimens are nearly circular, silky in appearance and 

 often tinged with pink." Edg. Smith'' unites with this species the following: — 

 D. scfibriuscula, Reeve (? of Philippi), D. ovalis, Römer, D. eiinice, A. Adams, and 

 D.bisecta, Reeve (?) (i.e. biscocta, Reeve), the last species is recorded from Japan. 



Cyclina elegans, H. Ad. 



(PI. V, Figs. 14-15). 

 Liicina elegans, H.Adams, Proc. Zool. Soc. London, 1870, p. 791. 



Gulf of Rayong, 7 — 10 fathoms, sand, mud, shells (2). 



Long. 7 mm., alt. 7 mm., crass. 5 mm. 



Distribution: — Red Sea (M' Andrew). 



By examining H. Adams's original specimens in the British Museum I have 

 convinced myself that my specimens from the Gulf of Siam are identical with 

 Lucina elegans, H.Adams.' It is, however, incorrect when Adams refers that species 

 to the genus Lucina, it being a Cyclina; as his diagnosis is deficient and also par- 

 tially misleading, I give here a description and figures of my individuals:— Valves 



' Journal de Conchyliologie, vol.54, 1906, p. 216. 



- Memoirs and Proceed, of the Manchester Lit. and Phil. Soc , 4 .Ser., vol. 7, p. 45. 



' Proc. Zool. Soc. London, 1891, p. 421. 



* Mr. Edg. A. Smith has kindly verified my determination. 



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