156 60 



Distiilju I ion: — Maldive Archip. (Edg. Smith). — Nukahiva, Marquesas Isl. 

 (Reeve). 



P. sugillatus, Reeve, is closely allied lo the present species. 



Note. Pecten hybridus, Gniel. {P. squamosus, Gmel.), was taken by the Danish 

 Expedition at Singapore in 2 — 3 fathoms, on coral-reefs. 



Pecten (Pallium) plica L. 



Ostrea plica, Linné, Systema Nat., ed. X, 17,58, p. Ii97, No. 162. — ed. XII, p. lUS, No. 192. — Mus. 



Ludov. Ulr. Reg., p. 526, No. 10(i. 

 Pecten — — Reevk, Conchol. icon., VIII, Pecten, Sp. 16. 



— — — Martini u. Chemnitz, Conchyl. Cabin., VII, 2 Abtli., pp.53 and 96, pi. 14, figs. 3 — 4; 



pi. 26, fig. 4. 



— plicatiis, Chemnitz, Conchyl. Cabin., VII, p. 292, pi. 62, fig. 598. 



E. of Cape Liant, 9 fathoms, shells (1). S. of Koh Chuen, 30 fathoms, shells (2). 



Long. 41 — 42 mm., alt. 44—46 mm. 



Distribution:— Nicobars, Ceylon and Gulf of Manaar, Persian Gulf, Gulf 

 of Oman, Maldive Archip., Gulf of Aden, Red Sea and Gulf of Suez. — China Sea, 

 Japan (Nagasaki). 



Pecten subplicatus, Sow. 



Pecten siil'plicdiits, Sowuhby, Tliesaurus Conch., I, 1842, p. 64, pi. 13, fig. 37; pi. 14, ligs. 72, 73 and 81. 



— — — Heeve, Conchol. icon., VIII, Pecten, Sp. 17. 



— — — Martini u. Chemnitz, Conchyl. Cabin., p. 157, pi. 44, figs. 3 — 5. 



Koh Kram, 30 fathoms (1). North side of Koh Mesan, 10 — 15 fathoms, stones (1). 

 1 mile south of Koh Chuen, 30 fathoms, shells ('/2). Koh Kahdat, 1 fathom, sand ('/a). 

 Between Koh Kut and Koh Kahdat, 10 fathoms, shells ('/s). N. of Koh Kut, 15 

 fathoms, mud ('/2). 



Long. 15—30 mm., all. 15—33 mm. 



Distribution: — Gulf of Aden. — South Japan, Philippines, Moluccas, Celebes. 



Pecten velutinus, Sow., in my opinion is identical with the present species. ' 



Pecten fulvicostatus, A. Adams & Reeve. 



Pecten fulvicostdlas, A. Adams & Keicve, Mollusca of the voyage of H. M. S. Samarang, 1848, p. 74, pi. 21, 



fig. 11. 



— — — Reeve, Conchol. icon., VIII, Pecten, Sp. 123. 



— — — Martini u. Chemnitz, Conchyl. Cabin., VII, 2 Abth., p. 226, pi. 6(1, 



fig. 6. 



— Drimji, Reeve, Conchol. icon., VIII, 1853, Pecten, Sp. 152. 



— — Martini u. Chemnitz, Conchyl. Cabin., VII, 2 Abtli., p. 207, pi. 55, figs. 7— 8. 



— liiculenla, Reeve, Conchol. icon., VIII, 1853, Pecten, Sp. 59. - 



— luculentus, — Martini u. Chemnitz, Conchyl. Cabin., VII, 2 Abth., p 170, pi. 47, fig. 3. 



' Küster has expressed the same opinion in his Monograph of Pecten in Martini & Chemnitz, 

 loc. cit. p. 96. 



- A. H. Cooke, Ann. and Mag. Nat. Hist., Ser. 5, vol. 17, p. 134. — Bavav, Bull, du Museum d'Hist. 

 Nat. Paris, 1904, p. 366. 



