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Family Ostreidae. 



Genus Ostrea Linnaeus. 

 1758. Ostrea Linnaeus, Syst. Nat., (éd. X), p. 696. 



In the "Siboga" collection there are no représentatives of the genus Ostrea s. s., of which 

 Ostrea edulis (Linn.) was designated by Children ^) as the type. 



A number of very young shells from varions stations may possibly belong to one or 

 other ôf the species of this genus, but they can not be referred with certainty to any species. 



Subgenus Lopha Rôding. 



1798. Lopha Roding, Mus. Boltenianum, p. 168. 



1807. Alectryonia Fischer de Waldheim, Mus. Demidofif, III, p. 269. 



1840. Dendostrea Svvainson, Treat. Malacol., p. 389. 



1886. Alectryonia Fischer, Man. Conchyliol., p. 926. 



1895. Lopha Dali, Trans. Wagner Free Inst. Fhiladelphia, III, p. 672. 



1925. Lopha Woodring, Miocène Mollusks from Bowden, Jamaica, Pelecypods etc., p. 59. 



1925. Lopha Oostingh, Geol. Comm. Agr. Univ. Wageningen, n". 9, p. 250. 



1929. Lopha Dautzenberg, Faun. Colon. Française, III, p. 556. 



This subgenus of Ostrea is easily distinguished by the shell valves being subequal in 

 size and bearing deep radial folds. Dall selected O. [L.) crista-galli (Linn.) as the type of the 

 subgenus Lopha. 



I. Ostrea [Lopha) hyotis (Linn.). 



1742. Ostreitm structura peculiari Gualtieri, Ind. Test., pi. CIII, figs. C, C. 



1757. Rastellum D'Argenville, La Conch., Appendix, p. 393. pi. III, fig. F. 



1758. Mytilus Hyotis Linnaeus, Syst. Nat., (éd. X), p. 704. 

 1764. Mytilus Hyotis Linnaeus, Mus. Lud. Ulr., p. 538. 



1764. Huître pierreme difforme Knorr, Délices Yeux, I, p. 49, pi. XXIX, fig. i. 



1767. Mytilus Hyotis Linnaeus, Syst. Nat., (éd. XII), p. 1155. 



1780. Mytilus Hyotis Born, Test. Mus. Caes. Vindobon., p. 122. 



1780. Huitre Favanne, Conch., pi. XLV, fig. G. 



1785. Ostrea Hyotis etc. Chemnitz, Conch. -Cab., VIII, p. 58, pi. LXXV, fig. 685. 



1788. Ostrea hyotis Schroter, Conch.-Cab. Namen Reg., p. 76. 



1790. Mytilus Hyotis Gmelin, Syst. Nat., (éd. XIII), p. 3350. 



1797. Ostrea Gigas Humphrey (non Thunberg), Mus. Calonnianum, p. 53. 



1802. Mytilus hyotis Bosc, Hist. Nat. Coq., III, p. 159. 



18 17. Mytilus hyotis Dillwyn, Descr. Cat., I, p. 300. 



18 19. Ostrea hyotis Lamarck, Anim. sans Vertèb.. VI, p. 213. 



1821. Ostrea hyotis Blainville, Dict. Sci. Nat., XXII, p. 19. 



1824. Ostrea hyotis Dubois, Epitome, p. 127. 



1825. Ostrea Hyotis Sowerby, Cat. Tankerville, p. 27. 



183 1. Ostrea hyotis Deshayes, Encyclopéd. Méthod., II, p. 298. 



1836. Ostrea hyotis Deshayes in Lamarck, Anim. sans Vertèb., VII, p. 235. 



1845. Ostrea hyotis Catlow & Reeve, Conch. Nomencl., p. 86. 



1855. Ostrea hyotis Berge, Conchylienbuch, p. 92. 



1855. Mytilus hyotis Hanley, Ipsa Linn. Conch., p. 136. 



i) Children, J. G. — Quart. Journ. Sci. Lit. Arts, XV, p. 44, pi. III, fig. 90 (1823). 



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