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TERTIARY FAUNA OF FLORIDA 



Miocene of Santa Clara County, California; Pliocene, Santa Rosa County; 

 Pleistocene of San Diego, California ; recent from Lituya Bay, Alaska, to 

 Monterey, California. 



The nomenclature of this form has been much confused. Mr. Gabb 

 wrongly united with it 5". lucida Conrad, which is a distinct and good species ; 

 Soleinya ventricosa Conrad, which is a fine, large Miocene species of Solemya; 

 and Solcn patulus Dixon, which is a much larger, coarser form, with a broader 

 shell and straight clavicle, and is. not authoritatively known from south of 

 Alaska. The present species is longer, more slender, with a more oblique 

 clavicle and more parallel dorsal and ventral margins. If it is merely a geo- 

 graphical race of patula it deserves a name on account of the differences of 

 form. 



Siliqua (patula Dixon var?) oregonia Dall. 



Miocene of Astoria (?) and of Two-Mile Creek, near Coos Bay, Oregon 

 (Diller). 



A somewhat imperfect specimen from the Miocene shales collected by Mr. 

 Diller; differs from .9. Nuttallii by its strong and straight clavicle, its pro- 

 portionately wider shell, and its somewhat rostrate posterior extremity. It 

 appears to be adult, and if so is much smaller than S. patula, which also has 

 a more rounded posterior end. I await better material before figuring this 

 interesting form, which is probably the same as that referred to by Gabb as 

 5". patula from the Astoria Miocene. The shell measures about 65 mm. long 

 , and 25 wide. The pallial sinus appears to be decidedly deeper and narrower 

 than in 5". Nuttallii. 



Siliquaria edentula Gabb, from the Pliocene of California, is a Psammobia 

 and will be found referred to under that genus. 



The very young shells of Siliqua are donaciform and hardly recognizable 

 as belonging to the same group as the adults. 



Genus CTJLTELLUS Schumacher. 



Cultellus Schumacher, Essai, p. 130, 1817. Type Solen lacteus Spengler, pi. 7, fig. 4 

 (Chemn. Conch. Cab., vi., p. 51, pi. 5, fig. 35) Solen maxinms Gmelin non Wood 

 (cf. Dunker, Novit. Conch. Moll. Marina, p. 11, pi. iii., fig. 4, 1858) but not Cultellus 

 lacteus and maximus of Sowerby, Conch. Icon., Cultellus, pi. i, 1874. 



Not Cultellus Conrad, Journ. Acad. Nat. Sci. Phila., vii., p. 232, 1838 (= Tagelus Gray) ; 

 nor of G. B. Sowerby, Conch. Man., ed. ii., p. 129, 1842 (= Lutraria sp.). 



Cultellus Gray. Ann. Mag. N. Hist., xiv., p. 24, 1854; C. lacteus Spgl., 1704, = Solcn 

 magnus Wood, Gen. Conch., p. 130, 1815, not Ensis magnus Schumacher, 1817. 



