3o8 



The transverse stripes on the surface of the valves, as noted by Lynge, are not always 

 présent ; in old and worn shells they are altogether absent. The species is very variable in regards 

 to the outline and the convexity of the shells. 



Distribution: — A. subquadrata was described from the Persian Gulf, but has also been 

 recorded from Bombay and the Gulf of Siam. 



In the "Siboga" collection it is represented by two young valves brought up in a trawl 

 at St. 321 (6° 5'. 5 S., ii3°3o'E., 82 mètres). 



3. Aloidis taitensis (Lamarck). 



18 18. Corbnla taitensis Lamarck, Anim. sans Vertèb., V, p. 496. 



1824. Corbnla Taitensis Dubois, Epitome, p. 50. 



1835. Corbnla Taitensis Deshayes in Lamarck, Anim. sans Vertèb., VL p- 139- 



1843. Corbnla Tahitensis Hanley, Rec. Biv. Shells, p. 46, pi. XII, fig. 30. 



1843. Corbnla Taheitensis Reeve, Conch. Icon., II, Corbula, pi. II, fig. 15. 



1845. Corbnla Taheitensis Catlow & Reeve, Conch. Nomencl., p. 10. 



1856. Corbula Taheitensis Adams, H. & A., Gen. Rec. MolL, II, p. 357. 



1860. Corbula Taheitensis Reeve, Elem. Conch., II, p. 156. 



1868. Corbnla Taheitensis Tryon, Amer. Journ. Conch., IX, p. 66. 



1884. Corbîila Tahitiensis Grasset, Ind. Test. Viv., p. 244. 



1890. Corbnla Tahitiensis Paetel, Cat. Conch. Samm., III, p. 20. 



1891. Corbnla taheitensis Smith, Proc. Zool. Soc. London, p. 430. 



1899. Corbula taheitensis Hedley, Mem. Austral. Mus., III, pp. 506, 529. 



1899. Corbula taheitensis Melvill & Standen, Journ. Linn. Soc. London (Zool.), XXVII, p. 199. 



1900. Corbula Taheitensis Newton, Geol. Mag., VII, p. 557. 



1902. Corbnla Taheitensis Shopland, Proc. Malacol. Soc. London, V, p. 177. 



1903. Corbula Taitensis Hidalgo, Obras Malacol., II, p. 31. 

 1905. Corbnla Taitensis Hildalgo, Cat. Filip., p. 295. 



1909. Corbnla Taheitensis Lynge, D. Kgl. Dansk. Vidensk. Selsk. Skr. Nat.-Math., (7) V, p. 269. 



1910. Corbnla Taitensis Hedley, Austral. Ass. Adv. Sci., XII, p. 351. 



1928. Corbnla Taheitensis Faustino, Summary Philippine Mar. Freshw. MolL, p, 114. 



A. taitensis is closely allied to A. modesta, but the latter species is more solid, larger 

 in size, and its concentric sculpture consists of a few thick, rounded bi- or trifid ribs, the interspaces 

 are usually narrow and very shallow. A. taitensis is, further, more angulate anteriorly. 



Distribution: — A. taitensis is widely distributed in the Indo-Pacific. 



The "Siboga" Expédition collected a good séries of shells of the species in the Bay of 

 Bima (St. 47), on the east side of Pajunga Island, Kwandang Bay (St. 115), at the Anchorage 

 Savvan, Siau Island (St. 125), Anchorage ofî Beo, Karakelang Islands (St. 131) and Anchorage 

 north of Salomakiëe (Damar) Island (St. 144). 



4. Aloidis modesta (Hinds). 



1843. Corbnla modesta Hinds, Proc. Zool. Soc. London, p. 57. 



1843. Corbnla modesta Reeve, Conch. Icon., II, Corbnla, pi. II, figs. \^a, b. 



1844. Corbnla modesta Hinds, Voy. "Sulphur", p. 69, pi. XX, fig. 9. 



1845. Corbnla modesta Catlow & Réeve, Conch. Nomencl., p. 9. 

 1856. Corbula modesta Adams, H. & A., Gen. Rec. MolL, II, p. 357. 

 1860. Corbula modesta Reeve, Elem. Conch., II, p. 156. 



1868. Corbnla modesta Tryon, Amer. Journ. Conch., IV, p. 65. 



