ART. IT ILLUSTRATIONS OP TYPES OF SHELLS DALI. 23 



OSTREA CRISTATA Born 



Plate 28, figs. 7, 8 



Ostrea cristata Born, Mus. Caes., pi. 7, fig. 3, 1780. 

 Florida, on Gorgonians. U. S. Nat. Mus. Cat. No. 95934. 



OSTREA EQUESTRIS Say 



Plate 28, figs. 1, 3 



Ostrea eqiiestris Say, Amer. Conch., vol. 6, pi. 58, 1834. 

 Florida. U. S. Nat. Mus. Cat. No. 95935. 



OSTREA FRONS Linnaeus 



Plate 28, fig. 5 



Mytihis frons Linnaeus, Syst. Nat, ed. 10, p. 704, 1758. 

 Florida. U. S. Nat. Mus. Cat. No. 207000. 



OSTREA PERMOLLIS Sowerby 



' Plate 27, fig. 9, 10 



Of'iraea permollis Soweeby, in Conch. Iconica, Ostraea, pi. 10, figs. 18a, 18b, 

 Jan. 1871. 

 Florida. U. S. Nat. Mus. Cat. No. 17.3264. 



PECTEN (LYROPECTEN) PITTIERI Dall 



Plate 17, fig. 6 



Pecten (Lyropecten) pittieri Dall, Smithsonian Misc. Coll., vol. 59, p. 10, 1912. 

 Later Tertiary of Moen Hill, near Limon, Costa Rica. U. S. Nat. Mus. Cat. 

 No. 214368. 



PHACOIDES (PARVILUCINA) TENUISCULPTA Carpenter 



Plate 20, fig. 5 



Lucina tenuisculpia Cabpenter, Suppl. Rep. Brit. Assoc, p. 642, 1864. 

 Puget Sound. U. S. Nat. Mus. Cat. No. 122581. 



PHENACOPTYGMA CORTEZI Dall 



Plate 1, fig. 7 



DophncUa {Siirculina) cortesi Dall, Bull. Mus. Comp. Zool., vol. 43, No. 6, 



p. 292, 1908. 

 Phenacoptygma cortesi Dall, Proc. Biol. Soc. Wash., vol. 31, p. 138, 1918; Proc. 

 U. S. Nat. Mus., vol. 56, No.. 2295, p. 308, 1919. 

 Cortez Bank, off San Diego, Calif., in 984 fathoms. U. S. Nat Mus.. Cat. No. 

 204050. 



PSAMMOBIA (GOBRAEUS) EDENTULA Gabb 



Plate 19, fig. 1 



Psammobia edentula Gabb, Pal. Cal., vol. 2, p. 53, pi. 15, fig. 11, 1869. 

 San Pedro, Calif. ; recent specimen. U. S. Nat. Mus. Cat. No. 107787. 



