245 



A number of dead, young valves of this wide-spread Indo-Pacific species were collected 

 by the "Siboga" Expédition at Sailus Ketjil, Paternoster Islands (St. 37), in the Bay of Bima 

 (St. 47), Western Entrance Samau Strait (St. 59) and Kambaragi Bay, Tanah Djampeah (St. 64). 



Shells of D. (A.) histrio vary in sculpture; the concentric ridges are generally moderately 

 raised and sharp, but in older and worn shells thèse appear only sHghtly raised above the 

 gênerai surface. The interspaces are very broad and regular. 



3. Dosinia {Austrodosinia) conglobata Rômer. (Plate VI, Figs. 17 — 20). 



1862. Dosinia conglobata Rômer, Malakozool. Blàtt., VII, p. 211. 



1862. Dosinia conglobata Rômer, Mon. Dosinia, p. 39, pi. VII, figs. 2, 2a, b. 



1890. Dosinia conglobata Paetel, Cat. Conch. Samm., III, p. 89. 



A single shell collected at Macassar (St. 71) agrées so very closely with the description 

 and figures of Dosinia {Atcstrodosinia) conglobata Rômer, that I hâve no hésitation in referring 

 it to this species of hirtherto unknown habitat. 



The measurernents of this almost circular shell are: — length 36.7 mm., height 36.6 mm., 

 thickness 21 mm. I fisfure the shell. 



& 



4. Dosinia {Austrodosinia) amphidesmoides (Reeve). 



1850. Artemis Amphides77ioides Reeve, Conch. Icon., VI, Artemis, pi. VIII, figs. 48^:, b. 



185 I. Artemis amphidesmoides Sowerby, Thés. Conch., II, p. 659, pi. CXLI, figs. 17 — 19. 



1853. Dosinia amphidesmoides Deshayes, Cat. Conch. Brit. Mus., I, Veneridae etc.. p. 12. 



1857. Dosinia amphidesmoides Adams, H. & A., Gen. Rec. Moll., II, p. 431. 



i86o. Artemis Amphidesmoides Reeve, Elem. Conch., II, p. 112. 



1862. Dosinia amphidesmoides Rômer, Mon. Dosinia, p. 36, pi. VI, fig. 7. 



1890. Dosinia amphidesmoides Paetel, Cat. Conch. Samm., p. 89. 



1896. Dosinia amphidesmoides Casto de Elera, Cat. Sist. Filip., p. 759. 



1903. Dosinia Amphidesmoides Hidalgo, Obras MalacoL, II, p. 317. 



1905. Dosinia Amphidesmoides Hidalgo, Cat. Filip., p. 339. 



1906. Dosinia amphidesmoides Hedley, Proc. Linn. Soc. N. S. Wales, XXXI, p. 465. 

 19 10. Dosinia amphidesmoides Hedley, Austral. Ass. Adv. Sci., XII, p. 348. 



1928. Dosinia amphidesmoides Faustino, Summary Philippine Mar. Freshw. Moll., p. 66. 



The suborbicular shell of D. [A.) amphidesmoides is not very tumid, and the umbones 

 also are not very prominent. The sculpture consists of very regular concentric striae, and 

 though the striae are almost sharp and ridge-like near the posterior margin, there is no tendency 

 for their becoming lamellose. The odd valves in the "Siboga" collection are ail bleached white. 



Distribution : — D. {A.) amphidesmoides has been recorded from the Philippines and 

 from round Queensland in the Australian waters. 



The "Siboga" Expédition collected four odd valves of the species in the Bay of Badjo, 

 west coast of Flores (St. 50). 



5. Dosinia i^Aitstrodosinid) piibescens (Philippi). 



1847. Cytherea pubescens Philippi, Abbild. Beschreib. Conch., III, p. 24, Cytherea, pl.Vllï, t\g. 2,. 



1850. Artemis caelata Reeve, Conch. Icon., VI, Artemis, pi. V, fig. 28. 



185 I. Artemis pnbescens Sowerby, Thés. Conch., II, p. 672, pi. CLXIII, fig. 72. 



1853. Dosinia pubescens Deshayes, Cat. Conch. Brit. Mus.. I, Veneridae, etc., p. 15. 



