157 253 
It is not possible for me to distinguish between specimens from the Gulf of 
Siam and European individuals, e. g. from the Mediterranean. Besides the synonyms 
above enumerated seyeral more can undoubtedly be added, thus, e. g. V. semi- 
purpurea, Dunk.,' mitis, Desh.,* planicosta, Desh., ete.° 
Fam. Petricolidae. 
Naranio lapicida, Chemn. 
Venus Lapicida, CHemnirz, Conchyl. Cabin., X, 1788, p. 356, pl. 172, figs. 1664—65. 
— _ GMELIN, Syst. Nat., ed. XIII, p. 3269, No. 148. 
Naranio lapicida, — Desuayes, Catalogue of the Conchifera in the coll. of the Brit. Mus., I, 1853, 
p. 216, No. 2. 
Petricola. — Sowersy, Thesaur. Conchyl., I, 1855, p. 776, No. 20, pl. 166, fig. 26. 
Kress, West-Ind. mar. shells, 1864, p. 108. 
Sowersy in REEvE, Conchol. icon., XIX, Petricola, Sp. 24. 
= — — Epc. Smiru in Zoolog. Collect. of H. M.S. Alert, 1884, p. 98, No. 22. 
Choristodon lapicidum, CHEMNITZ, PrircHarp and Garirr, Proceed. Roy. Soc. Victoria, vol. 16, 1903, p. 121: 
Venus divaricata, CHEMNITZ, Conchyl. Cabin., X, 1788, p. 357, pl. 172, figs. 1666—67. 
Petricola | — p’OrBIGNY, Mollasques de Vile de Cuba, II, 1853, p. 265, No. 463. 
Naranio. — CuEemNitz, Desuayes, Catal. Conchif. Brit. Mus., I, 1853, p. 216, No.1. 
Petricola| — Sowerpy, Thesaur. Conchyl., Il, p. 776, No. 19, pl. 166, figs. 24—25 
_- — DesHaves, Mapitte et Le Mesve, Journ. de Conchyl., vol. 14, 1866, p. 117. 
— _— Cuemnitz, v. Martens in v. d. DecKkEN’s Reisen in Ost-Afrika, III, 1869, p. 66, pl. 3, fig. 3. 
-— — _ Sowerby in Reeve, Conchol. icon., XIX, Petricola, Sp. 22. 
Choristodon divaricatum, Cuemnirz, H. & A. ADAMS, Genera of rec. Moll., II, 1858, p. 442, pl. 110, fig. 2 
Venus divergens, GMELIN, Syst. Nat., ed. XIII, 1790, p. 3269, No. 147. 
Petricola costata, Lamarck, Systéme d. anim. s. vert., 1802, p. 121. 
Naranio — = Gray, Ann. and Mag. Nat. Hist., 1853, XI, p. 38. 
Petricola lucinalis, -- Hist. nat. d. anim. s. vert., V, 1818, p. 504, No. 4. — éd. 2, VI, p.157, No. 4. 
Koh Chang, 1 fathom, old coral blocks (12). Koh Kahdat, 1 fathom, sand (1). 
Long. 7—23 mm. 
Distribution:— Gulf of Manaar, Maldive Archip., Persian Gulf, Gulf of 
Oman, Aden, Red Sea, Mauritius, Zanzibar, Mozambique, Querimba Isls. — Poulo 
Condor, Aru Isl., Torres Strait, Mast Head Reef (Queensland), St. Vincent's Gulf 
(South Australia), Victoria, Yap, Pelew Isls., Funafuti Atoll. -- East coast of America: 
Florida, Greater and Lesser Antilles (to Martinique, DAL). 
Fam. Cardiidae. 
Cardium (Acanthocardium) setosum, Redf. 
Cardium setosum, REDFIELD, Ann. Lyceum Nat. Hist. New York, IV, (1846) 1848, p. 168, pl. XI, fig. 1 
= = — Epa. Smiru, Rep. Challenger Lamellibranchiata, 1885, p. 158. 
1 Dunker, Index moll. mar. Japon., p. 208. — Prispry, Catal. of the Mar. Moll. of Japan, 1895, p. 129. 
2 Taken at Botany Bay (ANGas) and Tasmania (Tate & May). 
’ That V.Irus may also occur ornamented with vivid colours has been stated by DAaurzENBERG 
(loc. cit. p. 443) and Pattary (Journ. de Conchyl., 1900, pp. 403—4); it then recalls V. exotica, Hanl. 
