TRANSACTIONS OF WAGNER 

 006 



TERTIARY FAUNA OF FLORIDA 



Subfamily PTEROPSIDIN^E. 

 r.cmis PTEROPSIS Conrad. 



I have chosen this genus from which to form the subfamily name, as it is 

 the prototype of the more modern Labiosa and Raeta. The typical species 

 was described by Conrad under the name of Lntraria papyria (Fos. Sh. Tert, 

 p. 41, Oct., 1833), while two months later Dr. Lea gave the name of Martra 

 dentala to a perfectly recognizable fragment of the same species. 



Genus LABIOSA (Schini.lt) Mollcr. 



The name Labiosa proposed in MS. by Schmidt for the Anatina of Schu- 

 macher (1817, non Lam., 1809) was printed in an abstract of this MS. after 

 Schmidt's death by Moller in 1832, though without any diagnosis. As it is 

 perfectly identifiable it must be allowed to stand. It is the Cypricia of Gray 

 (1840) and the Lcitcoparia of Ch. Mayer in 1867. The typical form does not 

 seem to antedate the Pliocene in Americaj though in the later Miocene the 

 subgenus Raeta is fully developed. 



Labiosa lineata Say. 



Littraria lincata Say, Journ. Acad. Nat. Sci. Phila., ii., p. 310, i8ai. 



Mactra Nuttallii Rve., Conch. Icon., Mactra, fig. 125, 1854; not 1 .iilriiriu \ 'ntlallii Conr. 

 Mactra recurua Gray, Wood's Ind. Test., Suppl., fig. 2, 1828. 

 Mactra papyracca Auct., non Lam. 



Pliocene of the Caloosahatchie River and Shell Creek, Florida, Dall and 

 Willcox ; Pleistocene of the southeastern United States ; living from the coast 

 of New Jersey to San Paulo, Brazil. 



The fossil specimens do not seem to differ at all from the recent ones and 

 run through a parallel series of variations chiefly in the outline and inflation 

 of the valves. The only other typical Labiosa is found on the Pacific coast 

 of middle America, the L. aiiatina Spengler (1802), also named pclliiciila by 

 Schumacher (1817), L. papyracca by Lam. (1818), and L. (Cypricia) cyprinns 

 by Gray (1828). It is not known to occur in a fossil state. 



Subgenus RAETA Gray. 



Raeta Gray, Ann. Nat. Hist., ii., p. 43, 1853. 

 Cryptodon H. and A. Adams ; not of Conrad or Turton. 

 Lovellia C. Mayer, 1867. 

 Type L. (A'ni-fa) canaliculala Say. 



