TERTIARY FOSSILS. 89 



Sub-Genus HYPOGELLA, Gray. Solena, Browne (Pre-Lin.). 



S. (11.) PROTEXTA, Con., Sp. 



Donax protcxta, Con. ; "Wilkes's Exped., p. 728, pi. 17, fig. 9. 

 Holena proiexta, Con. ; Jour. Conch., 1865, p. 152. 

 Plectosolen protexta, Con. ; Smithsonian Check List, No. 242. 

 Miocene, Astoria. 



SILIQUARIA, Schum. ? S. edentula, Gabb. 



? S. edenlula, Gabb, Pal. Cal., Vol. 2, p. 53, pi. 15, fig. 11. 

 Pliocene, San Eernando. 



MACH2ERA, Gld. M. patula, Dixon, sp. 



Solen patulus, Dixon; Voyage Around the World, &c, p. 355, fig. 2. 

 Machcera patula, Cpr. ; Rep. W. C. Moll., 1863, p. 638. 

 Solen maxima, "Wood. ; Gen. Conch., pi. 31, fig. 3. 



Solecurtus Nuitallii, Con. ; Jour. Phil. A. N. S., 1 S., Vol. 7, p. 232, pi. 17, fig. 9. 

 Solemya ventricosa, Con. ; "Wilkes's Exped., p. 723, pi. 17, fig. 7, 8. 

 Id., Con. ; Jour. Conch., 1865, p. 153. 



Siliqua patula, Con. ; Jour. Conch., 1867, app., Cat. Solenidae, p. 25. 

 Siliqua Californica, Con. ; Jour. Conch., 1867, p. 193.* 



Miocene, Astoria, Martinez, Tomales, and Max. Martinez Ranch, Santa Clara 

 County ; Pliocene, Santa Rosa. Living. 



SOLECURTUS, Blainv. S. subteres, Con. 



S. subteres, Con. ; Jour. A. N. S. Phil., 1 Ser., Vol. 7, p. 233, pi. 17, fig. 10. 

 Post-Pliocene, Santa Barbara. Living. 



GLYCTMEPJS, Lam. G. generosa, Gld., sp. 



Tanopaza generosa, Gld. ; Proc. Bost. N. H. Soc, 1850, p. 215. 

 Id., Gld. ; Wilkes's Exped., Moll., p. 385, pi. 34, fig. 507. 



* Described from a young specimen, differing only in being a little straighter 

 than usual on its basal margin. It seems incomprehensible to a Californian con- 

 chologist, how Mr. Conrad could have redescribed this familiar form, for which he 

 had already made threesynonyms, and with thefineseries in the Academy's museum 

 for comparison. " Body Bay," its locality, should read Bodega Bay. " Nuttallii" 

 has been persistently referred by Mr. Conrad to the Sandwich Islands. It does 

 not occur there, but is one of the commonest of our Californian shells. 

 PAL. VOL. II. — 13 



