1846. Tellina casta Hanley in Sowerby, Thés. Conch., I, p. 253, pi. LVI. fig. 9. 

 1856. Tellina [Arcopagia] casta Adams, H. & A., Gen. Rec. MolL, p. 396. 

 1860. Tellina casta Reeve, Elem. Conch., II, p. 125. 



1868. Tellina casta Sowerby in Reeve, Conch. Icon., XVII, Tellina, pi. XL VI, fig. 269. 

 1868. Tellina [Arcopagia) casta Tryon, Amer. Journ. Conch., IV, p. 89. 



187 [. Tellina [Arcopagia) casta Rômer, in Martini-Chemn. Conch.-Cab. (N. F.), X (4), Tellina, p. 95. 

 1874. Tellina [Arcopagia) casta Dunker, Cat. Mus. Godeffroy, V, p. 166. 

 1878. Arcopagia casta Bertin, Nouv. Arch. Mus. d'Hist. Nat. Paris, (2), I, p. 323. 

 1885. Tellina [?) casta Smith, "Challenger" Lamellibranchia., p. 109. 



1887. Tellina [Arcopagia ?) casta von Martens, Journ. Linn. Soc. London (Zool.), XXI, p. 215. 

 1890. Tellina [Arcopagia) casta Paetel, Cat. Conch. Samm., III, p. 44. 



1909. Tellina [Arcopagia:) casta Lynge, D. Kgl. Dansk. Vidensk. Selsk. Skr. Nat. -Math., (7) 

 V, p. 193. 



Ail the shells of T. {A.) casta collected by the "Siboga" Expédition are of a white colour. 

 The left valve is more convex than the right and the sculpture consists of very fine concentric 

 rugae. The largest spécimen is 15 mm. long X 13 mm. high. 



Distribution: — T. [A.) casta has been recorded from the Mergui Archipelago in the 

 west to Torres Strait in the Australian waters. 



The "Siboga" Expédition collected a large number of odd valves at Sailus Ketjil, Pater- 

 noster Islands (St. 37), Bay of Bima (St. 47), Madura Bay (St. 51), Bay of Nangamessi, Sumba 

 (St. 53), Macassar (St. 71), west of Kwandang Bay entrance (St. 116) and Anchorage off Lirung, 

 Salibabu Island (St. 133). 



16. Tellina {^Arcopagia) fabrefacta Pilsbry. (Plate V^, fig. 36). 



1904. Tellina fabrefacta Pilsbry, Proc. Acad. Nat. Sci. Philadelphia, p. 555, pi. XLI, figs. 11, 12. 

 1906. Tellina fabrefacta Hedley, Proc. Linn. Soc. N. S. Wales, XXXI, pp. 466, 478. 



1909. Tellina fabrefacta Lynge, D. Kgl. Dansk. Vidensk. Selsk. Skr. Nat. Math., (7) V, p. 189. 



1910. Arcopagia fabrefacta Hedley, Austral. Ass. Adv. Sci., XII, p. 350. 



A single valve, which I assign to T. i^. A^ fabrefacta agrées with Pilsbry's description 

 and figures of this species. I hâve also compared it with shells of this species from Oueensland 

 in the British Muséum (Nat. Hist.), London, and can find no différence between them. I figure 

 this valve. 



I am not quite definite about the subgeneric position of this species, but it appears to 

 belong to the subgenus Arcopagia. 



Distribution: — T. [A ^ fabrefacta has been recorded from Japan ; Oueensland, Australia; 

 Singapore and the Gulf of Siam. 



A single valve of this species was collected by the "Siboga" Expédition at Macassar. 



17. Tellina {Pseudarcopagia) costata Sowerby. 



1867. Tellina costata Sowerby in Reeve, Conch. Icon., XVII, Tellina, pi. XXXIV, fig. 194. 



1868. Tellina [Arcopagia) costata Tryon, Amer. Journ. Conch. IV, p. 89. 



1878. Arcopagia costata Bertin, Nouv. Arch. Mus. d'Hist. Nat. Paris, (2) I, p. 322. 



1885. Tellina [Arcopagia) pretiosa Smith (ex parte), "Challenger" Lamellibranchia., p. 104. 



1890. Tellina costata Paetel, Cat. Conch. Samm., III, p. 44. 



1896. Tellina [Tellinella) costata Casto de Elera, Cat. Sist. Filip., p. 726. 



