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TERTIARY FAUNA OF FLORIDA ^"^ 



son; and of Gay Head, Martha's Vineyard, Massachusetts, J. B. Wood- 

 worth. 



This is a rare species with a perfectly regular unsinuated pallial line. 



The section Veloritina Meek is represented by C. nebrascensis Meek and 

 Hayden, from the Judith River beds ; C. occidentaUs Meek and Hayden, ditto ; 

 C. Bannisteri Meek, which is perhaps identical with C. occidentaUs, and C. 

 cytheriformis Meek and Hayden, also from the Judith River. 



Cyanocyclas is represented by C. umbonella Meek and the following species : 

 C. Cleburni, C. obesa, C. Berthoudi, and Augheyi of White. C. intermedia 

 Meek and Hayden, C. moreauensis Meek and Hayden, and C. subtrigonalis 

 Meek and Hayden; C. calif ornica Gabb * (Pliocene, California) ; C. pugeten- 

 sis and C. Willisi White (Puget Group) have not had their internal char- 

 acters made out, but all the probabilities are in favor of their reference to 

 Cyanocyclas. These are all from the brackish water beds of the West, origin- 

 ally referred to the " Laramie" except where otherwise stated. C. cornelliana 

 Harris, 1897, from the Eocene of Hatchetigbee Bluff, is described from a 

 fragment and must for the present remain in doubt as to its affiliations. 



The brackish water Ptiget Group, which is widely extended on the north- 

 west coast, contains many Corbiculas, and doubtless several yet undescribed. 

 Its age is probably not uniform and the beds may represent a series extending 

 from the upper Cretaceous to the Oligocene. It is a little odd that so prolific 

 a fauna should have left no recent descendants, but none are found north of 

 Mexico. 



Genus VILLOBITA Gray. 



Villorita Gray, GrifBth's Cuvier, Moll., p. 601, pi. xxxi., fig. 5, 1833. Cyrena cyprinoides 



Wood. 

 Cyrenodonte Joannis, Guerin's Mag. de Zool., 1836, tab. 70. Nude name, referred to 



Villorita Gray by Deshayes, Cat. Conch. Brit. Mus., ii., p. 240, 1854. 

 Villarita Eydoux, Guerin's Mag. de Zool., 1838, p. 11, pi. cxix., fig. 2, Cyrena recurvata 



Val., fide Eydoux, -|- C. Gaudichaudi Eydoux on plate ; Dunker, Mon. Nordd. Weald., 



p. 29, 1846. 

 Villorita Philippi, Handb. der Conchyl., p. 315, 1853. 



* Not Cyrena calif ornica Prime, = calif orniensis Prime, + C. subquadrata Deshayes, 

 1854, not of Sowerby, Geol. Trans., 2d Ser., iv., p. 345, pi. xxi., fig. . 8, 1836, Wealden. 

 C. calif ornica is erroneously stated by Prime to come from the State of California. It 

 undoubtedly was obtained from one of the Mexican streams falling into the Gulf of 

 California. 



