304 



i83S- Psammobia Caerulescens Deshayes (ex parte) in Lamarck Anim. sans Vertèb., VI, p. [74. 



1839. Psammotaea amethyshts Anton, Verzeichniss, p. 4. 



1841. Psamiiiobia. caerulescens Reeve, Conch. Syst., p. jj, pi. LUI, fig. 3. 



1855. Psammobia tripartita Deshayes, Proc. Zool. Soc. London (vol. for 1854), p. 321. 



1856. Psammobia tripartita Reeve, Conch. Icon., X, Psammobia, pi. III, fig. 20. 

 1856. "i Gari gari, Adams, H. & A., (non Linn.). Gen. Rec. Moll., II, p. 390. 

 1856. Solen amethystns Hanley in Wood, Ind. Test., p. 20, pi. III, fig. 31. 

 1860. Psammobia tripartita Reeve, Elem. Conch., II, p. 129. 



1867. Psammobia tripartita Mitchell, Cat. Mus. Madras, p. 62. 



1868. Gari tripartita Tryon, Amer. Journ. Conch., IV, p. J6. 



1880. Gari amethystns Bertin, Nouv. Archiv. Mus. Paris, (2) III, p. 114. 



1884. Psammobia tripartita Grasset, Ind. Test. Viv., p. 252. 



1890. Psammobia [Gari] tripartita Paetel, Cat. Conch. Samm., III, p. 41. 



1896. Psammobia [AmphicJiaena] tripartita Casto de Elera, Cat. Sist. Filip., p. 721. 



1897. Psammobia [Heteroglypta] caerulescens von Martens (ex parte), in VVeber's Zool. Ergebn. 



Reise Ost-Ind., IV, Siiss.-Brackw. Moll., p. 244. 

 1903. Psammobia Amethystns Hidalgo, Obras Malacol., II, pp. 84, 10 1. 



1905. Psammobia Amethystns Hidalgo, Cat. Filip., p. 307. 



1906. Gari amethystina Standen & Leicester, Ceylon Pearl Oyster Rept., V, p. 293. 

 1914. Solen amethystns Dautzenberg & Fischer, H., Journ. Conchyliol., LXI, p. 221. 

 1928. Psammobia amethystns Faustino, Summary Philippine Mar. Freshw. Moll., p. 97. 



As a resuit of a careful examination of the extensive collections in the British Muséum 

 (Nat. Hist.), London, I hâve no doubt that P. Iripartita Deshayes is a synonym of G. {G.) 

 amethystus (Wood). Reeve's figure 20 on pi. III of "Conch. Icon." cited by von Martens for 

 Psain77iobia caertilescens is, as I hâve confirmed by examination of the original spécimen, to be 

 referred to G. [G.) a7nethystus. P. caerulescens Lam. M^as, as is indicated in the synonymy above, 

 a composite species. 



The transversely elongate, ellipsoïdal, compressed shell of this species is of a violet colour 

 with, in some cases, a few lighter coloured rays radiating to the ventral margin from the umbonal 

 région. The concentric ridges are divided longitudinally in the middle région of the shell, and 

 as a resuit their number in this région is twice that on the anterior or posterior parts of the shells. 



Distribution: — G. [G.) amethystus has a wide range in the Indo-Pacific. 



In the "Siboga" collection there is a single shell of this species collected at the Ambon 

 Anchorage (St. 181). 



10. Gari [Grammatomyà) squamosa (Lamarck). 



1818. Psammo.bia squamosa Lamarck, Anim. sans Vertèb., V, p. 514. 



1824. Psammobia squamosa Dubois, Epitome, p. 55. 



1826, Psammobia squamosa Blainville, Dict. Sci. Nat., XLIII, p. 479. 



1835. Psammobia squamosa Deshayes, in Lamarck Anim. sans Vertèb., VI, p. 176. 



1841. Psammobia squamosa Delessert, Rec. Coq. Lamarck, pi. V, figs. 6a — c. 



1842. Psajumobia squamosa Hanley, Rec. Biv. Shells, p. 57, pi. XI, fig. 47. 



1844. Psammobia squamosa Chenu, Illustr. Conchyliol., pi. I, fig. (ya, b. 



1845. Psammobia squamosa Catlovv & Reeve, Conch. Nomencl., p. 21. 



1850. Psammobia rugnlosa Adams & Reeve, "Samarang" Moll., p. 8r, pi. XXIV, figs. \a b. 



1855. Psammobia squamosa Berge, Conchylienbuch, p. 45, pi. IV, fig. 4. 



1856. Gari squamosa Adams H. & A., Gen. Rec. Moll., II, p. 390. 



1857. Psammobia denticulata, P. squamosa and P. rugnlosa Reeve, Conch. Icon., X, Psammobia 



pi. VII, figs. 49, 50 [a, b.) 51. 



