310 



igi6. Corbula crassa Hedley, Journ. Proc. Roy. Soc. W. x'^ustralia, I, p. 169. 



1917. Corbula crassa Odhner, Kungl. Sv. Vet. Akad. Handl., LU, N° 16, p. 26. 

 1928. Corbula crassa Faustino, Summary Philippine Mar. Freshw. Moll., p. i 1 3. 



Young shells of A. crassa vary greatly in outline, thickness and sculpture from adult 

 shells of the species. I figure a séries to illustrate the changes undergone by the shells during growth. 



Distribution: — A. crassa has a wide range in the Southern Pacific and has been recorded 

 as far west as the Gulf of Manaar in the Indian Océan. 



In the "Siboga" collection it is represented from the Bay of Bima (St. 47), Bay of Badjo, 

 west coast of Flores (St. 50), west of Kwandang Bay entrance (St. ii6), between the Islands 

 of Wowoni and Buton, northern Entrance of Buton Strait (St. 204) and Sapeh Bay, east coast 

 of Sumbawa (St. 311). 



6. Aloidis tunicata (Hinds). 



1843. Corbula tunicata Hinds, Proc. Zool. Soc. London, p. 55. 



1843. Corbula tunicata Reeve, Conch. Icon., II, Corbula^ pi. I, fig. 5. 



1844. Corbula tunicata Hinds, Voy. "Sulphur", p. 68, pi. XX, fig. 4, 5. 



1845. Corbula tunicata Catlow & Reeve, Conch. Nomencl., p. 10. 

 1848. Corbula tunicata Krauss, Siidafr. Moll., p. 2. 



1856. Corbula tunicata Adams, H. & A., Gen. Rec. Moll., II, p. 357. 



1860. Corbula tunicata Reeve, Elem. Conch., II, p. 157. 



1867. Corbula tunicata Angas, Proc. Zool. Soc. London, p. 913. 



1868. Corbula tunicata Tryon, Amer. Journ. Conch., IV, p. 66. 

 1874. Corbula tunicata Dunker, Cat. Mus. Godeffroy, V. p. 165. 

 1876. Corbula tunicata. Tapparone-Canefri, Viag. "Magenta", p. 224. 

 1884. Corbula tunicata Grasset, Ind. Test., Viv., p. 244. 



1884. Corbula tunicata Smith, Rept. Voy. "Alert", p. 103. 



1885. Corbula tunicata Smith, "Challenger" Lamellibranch., p. 29. 



1887. Corbula tunicata von Martens. Journ Linn. Soc. London (Zool.), XXI, p. 217. 



1890. Corbula tunicata Paetel, Cat. Conch. Samm., III, p. 20. 



1892. Corbula tunicata Sowerby, Mar. Shells S. Africa, p. 55. 



1896. Corbula tunicata Casto de Elera, Cat. Sist, Filip., p. 710. 



1898. Corbula tunicata Tate, Trans. Roy. Soc. S. Australia, XXII, p. 68. 



1903. Corbula tunicata Pritchard & Gatliff, Proc. Roy. Soc. Victoria, XVI, p. 10 1. 



1903. Corbula tunicata Hidalgo, Obras Malacol., II, p. 29. 



1905. Corbula tunicata Hidalgo, Cat. Filip., p. 295. 



1909. Corbula tunicata Lynge, D. Kgl. Dansk. Vidensk. Selsk. Skr. Nat.-Math., (7) V, p. 266. 



1910. Corbula tunicata Hedley, Austral. Ass. Adv. Sci., XII, p. 35t. 



1918, Corbula tunicata Hedley, Journ. Proc. Roy. Soc. N. S. Wales, LI, p. M. 31. 

 1928. Corbula tunicata Faustino, Summary Philippine Mar. Freshw. Moll., p. i 14. 



Lynge includes A. scaphoides (Hinds) in the synonymy of A. tunicata, but the two species 

 are quite distinct. In A. tunicata the shells are comparatively more elongate, more rostrate, 

 with a more prominent sculpture, and hâve the umbonal région much depressed and lying almost 

 at right angles to the hinge-line. 



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



In the "Siboga" collections there are two shells of the species coUected in Sulu Harbour, 

 Sulu Island (St. 104) and Sapeh Bay, east coast of Sumbawa (St. 311). 



