TRANSACTIONS OF WAGNER 

 1042 



TERTIARY FAUNA OF FLORIDA 



Metis chipolana n. sp. 

 Plate 47, Figure 21. 



Oligocene of the Chipola horizon, at Alum Bhiff and the Chipola River, 

 Florida ; BLirns. 



Shell small for the genus, nearly equilateral, not quite equivalve, the left 

 valve slightly larger, evenly rounded in front, pointed and attenuated behind ; 

 beaks lowr, lunule and escutcheon deeply impressed, narrow ; posterior end 

 markedly flexed, with an obvious fold or emargination of the valve just above 

 the posterior basal angle ; surface finely radially striate, with a fine concentric 

 lamellation which is more distinct towards the base and over the fold ; pallial 

 sinLis obliquely ascending, free from the pallial line below, as in Arcopagia. 

 Lon. 44, alt. 36, diam. 16 mm. 



This species is smoother and more regular than any of the other forms 

 known from America, and recalls M. Dombeyi of the Pacific recent fauna. 



Metis biplicata Conrad. 

 Tellina biplicata Conrad, Journ. Acad. Nat. Sci. Phila., vii., p. 152, 1834; Fos. Medial 



Tert., p. 36, pi. xix., fig. 4, 1840; not of Tuomey and Holmes, Guppy, or Emmons. 

 Metis biplicata Conrad, Proc. Acad. Nat. Sci. Phila. for 1862, p. 573 (in part), 1863; 



Am. Journ. Conch., v., p. gg, i86g. 



Lower Miocene of Maryland, on the Choptank River, the Patuxent, Plum 

 Point, etc.; Pliocene of the Caloosahatchie River, Florida (?). 



The Caloosahatchie specimen is quite imperfect and requires confirmation 

 by better material, but as far as it goes it resembles this species more than 

 any of the others. AI. biplicata has been confused with several other species 

 which are discriminated in this memoir, but which seem quite recognizable. 

 The pallial sinus is low, subequal in the two valves, and partly confluent below. 



Metis magnoliana n. sp. 



Plate 4g, Figure 6. 



Tellina biplicata Tuomey and Holmes, Pleioc. Fos. S. Car., p. 88, pi. xxii., fig. 3, 1856; 

 Emmons, Geol. Rep. N. Car., p. 296, fig. 225, 1858; not of Conrad, 1834. 



Upper Miocene of the Peedee River, South Carolina, and of the Natural 

 Well and Magnolia, Duplin County, North Carolina ; Tuomey and Burns. 



Shell subquadrate, subequilateral, rounded in front, with the posterior 

 dorsal area compressed and elevated, extending backward beyond the posterior 



