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Superfamily Ostracea. 

 family Ostreidae. 

 Genns OSTP.SA (Linnaeus) lamarck. 



0ST3SA I.3;G0D0II Hanley. 



Ostrea megodon Zanley, 1845, Proc. 2ool. 3oc. London for 1845, 



p. 106. 

 Ostrea gallus Yalenoiennes. 1846, Yoy. Yenus , Ooquille, pi. 21. 

 Ostrea cerrosensl s Gabb, 1869, Pal. California, vol. 2, pp. 55, 



106, pi. 11, fig. 61. 

 Ostrea galliis Yalenoiennes. Gabb, 1869, "^our. 3onch., vol* 5, 



p. 32. 

 Ostrea raepodon . Hanley, P^eeve, 1871, Oonch., Icon., Ostrea , pi. 



12, figs. 24a-b. 

 Ostrea g allus Yslenciennes, Heilprin, in 'kTiite, 1884, Fourth 



Ann. -iept. U, 3. Geal. Stirver, p. 715. 

 Ostrea me^odon Hanley, Dsll, 1898, Trans. ,7agner free Inst. Sci., 



Philadelphia, vol. ?, i^t. 4, pp. 685-686. 



Description .- "Ost. testa falcata, glabra, solida, subaequi- 

 valvi, pallide livido-purpurascente , marslnis versus plicata; pli- 

 ois anticis 5 aut 6, maxirais, subangxilatis ; posticis minimis, ang- 



