1856. Cardium putinatum (non Linn.) and Veims pectinata (non Linn.), Hanley in Wood Ind. 



Test., p. 34, pi. V, fig. 30; p. 49, pi. VIII, fig. 90. 



1857. Cytherea gibbia Romer, Krit. Untersuch., p. 96. 



1857. Circe gibbia Adams, H. & A., Gen. Rec. Moll., II, p. 429. 



1858. Circe gibbia Fischer, P., Journ. Conchyliol., VII, p. 337. 

 1860. Cytherea gibbia Reeve, Elem. Conch., II, p. 108. 



1863. Cytherea [Crista) gibbia Rômer, Malakozool. Blàtt., X, p. 17. 



1863. Circe pectinata (non Linn.) and C. gibba (sic ex parte) Reeve, Conch. Icon., XIV, 



Circe, pi. V, figs. 20a, c, 21^, c, d. 

 1865. Circe gibbosa Fraser, Proc. Zool. Soc. London, p. 196. 



1867. Ctrce gibba (sic), Mitchell, Cat. Mus. Madras, p. 65. 



1868. Cytherea gibbia Pfeiffer in Martini-Chemn., Conch. -Cab. (N. F.), XI (I), Veneracea^ P-5i) 



pi. XVIII, figs. 7—9. 



1869. Circe [Crista] gibba (sic), Dunker, Cat. Mus. Godeffroy, IV, p. iii. 



1869. Circe gibba (sic), Frauenfeld, Verhandl. Zool. Bot. Ges. Wien, XIX, p. 882. 



1869. Cytherea [Crista) gibba (sic), Issel, Malacol. Mar. Rosso, p. 70. 



1869. Venus [Cytherea — Crista) gibbia, Rômer, Mon. Venus, p. 176, pi. XLVII, figs. 2,2^ — e. 



1869. Circe gibbia von Martens, von der Deckens Reise, p. 66. 



1869. Circe gibbia Adams, A., Ann. Mag. Nat Hist., (4) III, p. 233. 



1876. Circe gibbia Tapparone-Canefri, Viag. "Magenta", p. 237. 



1878. Cytherea [Crista) gibbia Kobelt, Illustr. Conchylienbuch, p. 335. 



1880. Circe [Crista) gibbia von Martens, Mobius Beitràg. Meeresf. Mauritius, Seychell., p. 325. 



1882. Circe gibbia Dunker, Ind. Moll. Mar. Japon., p. 202. 



1884. Cytheraea (sic) gibbia Grasset, Ind. Test. Viv., p. 264. 



1885. Circe gibbia Smith, "Challenger" Lamellibranchia, p. 143. 



1887. Circe [Crista) gibbia von Martens, Journ. Linn. Soc. London (Zool.), XXI, p. 211. 



1889. Circe gibba (sic), Morlet, L., Journ. Conchyliol., XXXVII, p. 169. 



1890. Circe [Crista) gibba (sic), Bôttger, O., Ber. Senckenberg. Ges., p. 170. 



1890. Circe gibbia Paetel, Cat. Conch. Samm., III, p. 75. 



1891. Circe [Crista) gibbia Fischer, P., Bull. Soc. Hist. Nat. d'Autun, IV, p. 23 [. 



1895. Cicre gibbia Pilsbry, Cat. Mar. Moll. Japan, p. 128. 



1896. Crista gibbia Casto de Elera, Cat. Sist. Filip., p. 746. 



1898. Crista gibbia Melvill & Sykes, Proc. Malacol. Soc. London, V, p. 47. 



1898. Crista gibbia Melvill & Standen, Journ. Conch., IX, p. 83. 



1903. Crista gibbia Hidalgo, Obras Malacol., II, p. 231. 



1905. Crista gibbia Hidalgo. Cat. Filip., p. 331. 



1905. Crista gibbia Dautzenberg & Fischer, H., Journ. Conchyliol., LUI, p. 213. 



1905. Circe gibbia Ovvston, Japan. Loochooan Shell, p. 39. 



1909. Circe [Crista) gibbia Lynge, D. Kgl. Dansk. Vidensk. Selsk. Skr., Nat. Math., (7) V, p. 234. 



1909. Crista gibbia Melvill, Trans. Linn. Soc. London (Zool.), XIII, p. 132. 



191 1. Crista gibbia Pelseneer, "Siboga" Lamellibranches (Anat.), p. 51, pi. XIX, figs. 6. 7. 



1928. Circe gibba (sic), Faustino, Summary Philippine Mar. Freshw. Moll., p. yj. 



Reeve's fig. 21 a is that of a full-grown shell of Gafrariwn menkei (Jonas) ^) and not 

 of G. gibbia which is a synonym of G. hnnidum. The shells of G. tumidum are neither so 

 elongate nor so tumid as those of G. menkei^ and do not hâve so prominent and incurved 

 umbones. In G. menkei, further, there are only traces of transverse ribs on the post-dorsal area, 

 u^hile in G. tumidum there are about a dozen quite distinct transverse ribs in this région. 



Distribution : — G. tumidtim has a wide range in the Indo-Pacific Région. A detailed 

 Hst of its records is published in Lynge's paper. 



In the "Siboga" collection the species is represented mainly by half grown shells collected 



i) Jonas, J. H. — Zeitschr. Malakozool., III, p. 66 (1846). 



