Trapezium dactylus, BruGurere, H. Kress, West-Indian mar. shells, 1864, p. 123. 
Coralliophaga dactylus, Bruauiére, P. Fiscuer, Moll. de l'Indo-Chine, p. 230. 
= carditoidea, BLAINVILLE, Manuel de Malacol. et de Conchyl., 1825, p. 560, pl. 76, fig. 3. 
Cypricardia Hornbeckiana, v’Orsicny, Moll. de Vile de Cuba, II, 1858, pl. 266, No. 464, pl. 26, figs. 33—34. 
— gracilis, SHUTTLEWORTH. 
Trapezium — — H. Kress, West-Indian mar. shells, 1864, p. 123. 
Coralliophaga striolata, H. AbAMS, Proc. Zool. Soc. London, 1870, p. 791, pl. 48, fig. 12. 
-— lithophagella, DuNKER (non LAMA ck), Index moll. mar. Japon., 1882, p. 209. 
Koh si Chang (2). Klong Salakpat (1). Koh Chang, 1 fathom, old coral blocks 
(taken in great numbers). North end of Koh Chang, 1 fathom, old coral blocks (7/2). 
Koh Kahdat, 1 fathom, sand (1). 
Long. 2—32 mm. 
Distribution: — Mergui Isl., Aden, Red Sea, Mauritius. — Poulo Condor, 
Philippines, Japan, Yap Isl., Uvea (Wallis Isl.), Lord Howe’s Isl. — East coast of 
America: Florida (Cedar Keys), Greater and Lesser Antilles. 
A. H. Cooke is of opinion that REEve’s C. laminata is probably synonymous 
with C. coralliophaga, Chemn. — Several of the specimens from the Gulf of Siam 
(at any rate the individual which was taken alive at Koh Kahdat, on a sandy 
bottom) convey the impression of not always boring in corals. It is a characteristic 
mark of distinction in this species that it has, on both apices, a small, dark stripe, 
which occurs in the specimens from botheAmerican and Asiatic waters. 
Fam. Lucinidae. - 
Lucina (Thyasira) edentula L. 
Venus edentula, Linn&, Syst. Nat., ed. X, 1758, p. 689, No. 122. — ed. XII, p. 1135, No. 146. Mus. Ludov. 
Ulr., 1764, p.508, No. 74 (non L. edentula, LAMAncK). 
Lucina — — Puitippt, Zeitschr. f. Malakozool., 1845, p. 179. 
Abbild. u. Beschreib. neuer od. wen. gek. Conchyl., II, 1847, p. 205, pl. 1, 
fig. 1. 
= = —  Dunker, Index molluscor. mar, Japon., 1882, p. 216, pl. 8, figs. 7—8. 
—  (Anodontia) edentula L., vy. Marrens, Journ. Linn. Soc., Zoology, vol. 21, 1887, p. 173, No. 65. 
—  edentula, LINNE, v. MARTENS, Siiss- u. Brackwasser-Mollusk. d. Ind. Archip., p. 229, pl. XI, figs. 1—2. 
—  Philippiana, Reeve, Conchol. icon., VI, 1850, Lucina, Sp. 23, and pl. V, fig. 25. 
S. of Koh Chuen, 30 fathoms (°/2). 
Long. 32—60 mm. 
Distribution: — Singapore, Mergui Archip., Nancowry Isl. (Nicobars, “Gala- 
thea” Exp.), Gulf of Manaar, Suez, Red Sea (ForsKAL, according to specimens from 
him, in the Zool. Mus., Copenhagen‘). — Japan, Liukiu Isl., Philippines, Moluccas, 
Lifu, Sulu Isl., Upolu, Tongatabu. 
In the Zoological Museum of the University of Copenhagen there are preserved 
under the name of L. fragilis, Phil. (Krauss), */2 specimens (which undoubtedly were 
contributed by Krauss himself) of L. edentula L. from Port Elizabeth (Cape), size 
as follows:— long. 49 mm., alt. 45 mm., crass. 37 mm., a size neyer altained by 
' The specimens were determined as L. globosa, Forsk. 
