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I. Chama [Chama) lobata Broderip. 



1834. Chama lobata Broderip, Proc. Zool. Soc. London, p. 149. 



1834. Chaîna lobata Broderip, Trans. Zool. Soc. London, p. 303, pi. CCCVIII, figs. 4, 5. 



1843. Chaîna Lobata Hanley, Rec. Biv, Shells, p. 228. 



1845. Chaîna lobata Catlow & Reeve, Conch. Nomencl., p. 70. 



1846. Chaîna lobata Chenu, lUustr. Conchyliol., pi. VI, figs. i, la, pi. VII, figs. la — ic. 



1847. Chama lobata Reeve, Conch. Icon., IV, Chama, pi. VI, fig. 29. 

 1853. Chaîna lobata Morch, Cat. Yoldi, II, p. 37. 



1857. Chama lobata Adams, H. & A., Gen. Rec. Moll., II, p. 463. 

 1860. Chaîna lobata Chenu, Man. Conchyliol., II, p. 116, figs. 552, 553. 

 1884. Chaîna lobata Grasset, Ind. Test. Viv,, p. 277. 



1888. Chaîna lobata Clessin in Martini & Chemn. Conch. -Cab. (N. F.), VIII (5), Chamidén, 

 p. 13. pi. VI, figs. 3, 4. 



1890. Chama [Accinella) lobata Paetel, Cat. Conch. Samm., III, p. 122. 



1891. Chaîna lobata Fischer, P., Bull. Soc. Hist. Nat. d'Autun, IV, p. 230. 

 1928. Chama lobata, Lamy, Journ. Conchyliol., LXXI, p. 338. 



Chama lobata is one of the dextral species belonging to the subgenus Chama s. s., of 

 Odhner's scheme. The species is easily recognised by its shell valves being concentrically laminated, 

 and the upper free right valve bearing laminae foliated in the middle and towards the posterior 

 margin. Both valves, further, are lobate anteriorly. 



Distribution: — The habitat of C. (C) lobata was given by Broderip as the "Island of 

 Nevis, West Indies", but as Reeve suggested this is wrong, as ail authentic spécimens of the 

 species are from off the Chinese coast. 



The "Siboga" Expédition collected 6 young valves from the Bay of Kambaragi, Tanah 

 Djampeah (St. 64). 



2. Chama {Chaîna) iostoma Conrad. 



1837. Chama iostoma Conrad, Journ. Acad. Nat. Sci. Philadelphia, VII, p. 256. 

 1847. Chaîna iostoma Reeve, Conch. Icon., IV, Chaîna, pi. II, fig. 7. 



1858. Chama iostoma Adams, H. & A., Gen. Rec. Moll., II, p. 463. 



1860. Chama iostoma Reeve, Elem. Conch., II p. 78. 



1861. Chaîna iostoma Tristram, Proc. Zool. Soc. London, p. 405. 



1869. Chaîna jostoma (sic) Frauenfeld, Verhandl. Zool. -Bot. Ges. Wien, XIX, p. 884. 

 1874. Chama iostoma Dunker, Cat. Mus. Godeffroy, V, p. 172. 

 1884. Chaîna iostoma Grasset, Ind. Test. Viv., p. 277. 



1889. Chaîna iostoma Clessin in Martini-Chemn., Conch. -Cab. (N. F.), VIII (5) Chamidén, p. 19, 



pi. VII, fig. 4. 



1890. Chama [Chaîna) iostoma Paetel, Cat. Conch. Samm., III, p. 122. 

 1897. Chama iostoma Sowerby, Mar. Shells S. Africa, Supplément, p. 26. 

 1903. Chaîna iostoma Hidalgo, Obras Malacol., II, p. 381. 



1905. Chama iostoma Hidalgo, Cat. Filip., p. 349. 



1911. Chama Ruppelli Pelseneer (non Reeve), "Siboga" Lamellibranches (Anat.), p. 58. 



1925. Chaîna iostoma Faustino, Summary Philippine Mar. Freshw. Moll. p. 52. 



Odhner (loc. cit., p. 74) suggests that C. iostoma is probably based on juvénile shells of 

 C. lazartts Linn. The spécimens collected by the "Siboga" Expédition ail hâve a thick encrustation 

 of calcareous matter deposited by marine Algae, and it is not possible to study the external 



