Arca (Scapharca) globosa, Reeve. 
Arca globosa, Reeve, Proc. Zool. Soc. London, XII, 1844, p. 45. 
—  Conchol. icon., Il, Area, Sp. 52. 
— (Anomalocardia) globosa, Reeve, Marrint u. CHemnirz, Conehyl. Cabin., VIII, 2 Abth., p. 203, pl. 48, 
fig. 4. 
— globosa, Rerve, Crosse et Fiscuer, Journ. de Conchyl., vol. 37, 1889, p. 292. 
?— (Seapharca) globosa, Reeve, an A.Branpri, Puivippr?, P. FiscHrn, Catal. d. Moll. de ’'Indo-Chine, p.216. 
— globosa, Reeve, Lamy, Journ. de Conchyl., vol. 55, 1907, p. 260. 
“Siam” (P. FiscuEr, loc. cit.). 
The Danish Expedition to Siam collected no specimens of this species. 
Distribution: — Annam, Philippines. 
P. Fiscuer (loc. cit.) as stated above, doubts the correctness of the determination. 
Arca (Scapharca) rhomboidalis, Ch. 
Arca rhomboidalis, Carmnirz, Conchyl. Cabin., VII, 1784, p. 210, pl. 56, fig. 552. 
= — - Nyst, Mem. de l’Acad. roy. d. sc. de Belgique, XXII, p. 62. 
— inaequivalvis, BruGuiire, Eneyclop. méthod., I, 1792, Hist. nat. d. vers., p. 106. 
— Lamarck, Anim. sans vert., 2 éd., VI, p.472, No. 30. 
— — Encyclop. méthod., pl. 305, fig. 3a. 
ae — Reeve, Conchol. icon., II, Arca, Sp. 54. 
at = _ KoxpetT in Martini u. Coemnirz, Conchyl. Cabin., VIII, 2 Abth., p. 40, 
pl. 3, fig. 1. : 5 
— hispida, Puitiprr, Abbild. u. Beschreib. neuer od. wenig gekannt. Conchyl., III, p. 86 (18), pl. V, fig. 4. 
— disparilis, Rerve, Conchol. icon., MH, 1844, Arca, Sp. 59. 
- — — Lamy, Journ. de Conchyl., vol. 55, 1907, p. 256. 
Coast of Lem Ngob (*/2). Sound of Koh Chang, 5 fathoms, soft clay ('/2). 
West coast of Koh Chang, 1 fathom, old coral blocks (‘/2). W. of Koh Kut, 30 
fathoms, sand and mud (7/2). Between Koh Kut and Koh Kahdat, 6 fathoms, clay 
mixed with sand ("/2). Same locality, 10 fathoms, shells (°/2). S. of Koh Bidang, 
9 fathoms, mud (?/2). 
Long. 4—50 mm. 
Distribution: — Salanga, Mergui Isls., Madras, the Gulf of Manaar, Panjim 
and Goa, Bombay, Persian Gulf. — Philippines, Moluccas, Borneo, Java, Timor. 
Lamy is of opinion that the Arca inaequivalvis of BRuGuI=RE and of REEVE is 
not identical with that species as defined by Kosett; therefore he places KoBELT’s 
form as a synonym of A. disparilis, Reeve (= A. rhomboidalis, Chemnitz), while he 
separates A. inaequivalvis (Bruguicre), Reeve, as a distinct species. 
Arca (Scapharca) vellicata, Reeve. 
Arca vellicata, Reeve, Proc. Zool. Soc. London, 1844, p. 42. — Conchol. icon., 1844, Il, Arca, Sp. 33. 
— (Seapharea) vellicata, Reeve, Koper in Marini u. CHemnirz, Conchyl. Cabin., VIII, 2 Abth., p. 177 
pl. 44, fig. 1. 
— (Anadara) - — Lamy, Journ. de Cochyl., vol. 55, 1907, p. 251. 
