167 263 



Tridacna sqiiumosa, Lamarck, Reeve, Conchol. icon., XIV, Tridacna, Sp. 3. 



— — — SowERBY, Thesaurus Conchy!., V, 1887, p. 180, pi. 485-489*, figs. 2, 7, 15, 17. 



— — — L. MoRLET, Journ. de Conchyl., vol. 37, 1889, p. 168. 



— — — P. Fischer, Catal. de Moll. de I'Indo Chine, p. 228. 



— — — Hidalgo, Obras nialacolôgicas, I, tom. Il, 1903, p. 386, No. 489. 



— gigas L. var. squamosa, Lamarck, Cli. Hedley, Australian Museum, Sydney, Memoir III, 1896 — 



1900, p. 504. 



Koh Kahdat, 1 — 2 fathoms, coral (1). 



Islands in the Gulf of Siani (Morlet). 



Long. 245 mm. 



Distribution: — Singapore, Mergui Isis., Nicobars, Ceylon, Seychelles. — 

 Poulo Condor, Annam, Philippines, Loo Choo Isis., Japan, Moluccas, Sulu Isis., 

 Java, Timor, New Guinea, Torres Strait, North and East Australia, New Caledonia, 

 South Sea Islands ("What information we have, suggests that the range of this 

 species is almost co-extensive with that of the reef-building corals." Ch. Hkdley 

 loc. cit.). 



Edg. Smith says ^ "I should not be surprised if Tridacna squamosa or Tridacna 

 rudis should prove to be the early stages of this colossal form {Tridacna gigas)." 

 A. H. Cooke- and Ch. Hedley' have arrived at a similar conclusion; Hedley thinks 

 that "No characters of permanent value separate T. squamosa from T. gigas." 



Tridacna crocea, Lam. 



Tridacna crocea, Lamarck, Hist. nat. d. anim. s. vert., VI, 1 p. 1819, p. 106. — éd. 2. VII, 1836, p. 10. 



— — — QuOY & Gaimahd, Voyage de l'Astrolabe, II, 1833, p. 488, pi. 79, figs. 2 3. 



— — — Martini u. Chemnitz, Conchyl. Cabin., VIII, 4 Abth., p. 6, pi. 1, fig. 6. 



— — — Reeve, Conchol. icon., XIV, Tridacna, Sp. 9 (incl. varr. Sp. 7 and 8). 



— — - SowERBY, Tliesaurus Conchyl., V, 1887, p. 181, pi. 486-87, figs. 5— 6, 8-10. 



North end of Koh Chang, 1 fathom, boring in old coral blocks (2). Koh Kahdat, 

 in coral blocks (1). 



Long. 115 mm., alt. 84 mm. 



Distribution: — Singapore, Mergui Isis., Andamans, Nicobars, Persian Gulf, 

 Aden, Madagascar. — Philippines, Loo Choo Isis., Moluccas, Cape York (N. Australia), 

 Lifu, New Ireland, Rarotonga. 



Fam. Chamidae. 



Chama multisquamosa, Reeve. 



Chaîna multisquamosa. Reeve, Conchol. icon., IV, 1846, Chama, Sp. 12. 



— — - Martini u. Chemnitz, Conchyl. Cabin., VIII, 5 Abth , p. 33, pi. 14, figs. 1—2. 



Many specimens taken in 23 different localities between Koh Rin and Koh 

 Kut, 1 — 30 fathoms, sand, shells, clay and mud. 



' Lamellibranchiata of the Challenger Expedition, p. 171. 



- Annals & Magaz. Nat. Hist, Ser. 5, vol. 18, p. 97. ' 



^ Australian Museum, Sydney, Memoir III, 1896 — 1900, pp. 504 — 5. 



