TRANSACTIONS OF WAGNER 



1432 



TERTIARY FAUNA OF FLORIDA 



Miocene of Reeds, Mar3-land; V. (C.) monilicosta Gabb, from the Pliocene of 

 Santa Barbara, California; and possibly V. inflatior Meyer, if that is not the 

 young of some Eocene species. I have no authoritative information of the 

 finding of V. horealis fossil except in the latest Pleistocene of Labrador, and 

 Point Shirley, Massachusetts. 



Venericardia monilicosta Gabb was erroneously referred to Texas by Con- 

 rad in his Eocene list of 1865. 



Cardita occidentalis Conrad, 1855, from Santa Barbara, California, may 

 well be identical with V. monilicosta, but I have not seen the type and the 

 description and figure are inadequate. C. ventricosa Gould is a recent species, 

 wrongly confused with some of the fossil forms ; Cardita siibtenta Conrad (in 

 Wilkes' Exploring Expedition, Geology) is similarly in doubt. All these were 

 at one time unwisely lumped together under the name of V. borealis by Gabb 

 and others. 



Subgenus PLEUROMERIS Conrad. 



Venericardia ( Pleuromeris ) parva Lea. 

 Venericardia parva Lea, Contr. Geol., p. 70, pi. ii.. fig. 49, 1833 ; Conrad, .A.m. Journ. 



Conch., i., p. 8, 1865 ; Checkl. Eoc. Fos. N. Am., p. 5, 1866. 

 Cardita (^Venericardia') transversa, mut. juvenis Gregorio, Mon. Claib., p. 213, pi. xxxi., 



figs. 14-22, 1890. 



Claibornian and Jacksonian Eocene of Mississippi, Louisiana, Alabama, and 

 Arkansas. 



This small species is not typical of the subgenus, but has the lateral teeth 

 which separate it from Venericardia and apparently foreshadows the subdivi- 

 sion, which does not appear in typical form until the Jacksonian. Gregorio has 

 apparently taken this species for the young of V. alticostata Conrad and has 

 figured the true young of V. rotunda under the name of parva, and the young 

 of alticostata under the name of mut. secans Gregorio, altogether a very com- 

 plete muddle. 



A variety (which may be called symmetrica) of this shell occurs both in 

 the Claibornian and Jacksonian, but appears to be very rare. It resembles the 

 ordinary form in every way except that the beaks are erect and central, the 

 dorsal slopes similar, and the resulting form of the shell a very regular oval. 

 At the first glance this seems very distinct. 



Venericardia (Pleuromeris) tellia n. sp. 

 Plate 56. Figure 2. 

 Oligocene of the Chipola beds on the Chipola River and Alum Bluff on the 

 Chattahoochee River ; Dall and Burns. 



