TRANSACTIONS OF WAGNER 



8lO 



TERTIARY FAUNA OF FLORIDA 



scars ovoid, elongate, and partly in contact, with a slight insinuation of the 

 pallial line in front of them ; margin of the right valve somewhat impressed 

 below the beak so as to pass behind the prominence on the margin of the 

 opposite valve when closed. Alt. 17, lat. 10, diam. 10 mm. 



This is a much heavier and more triangular shell than C. leucoph&ata 

 and more elongate than C. Rossmassleri, with a different hinge from either. 

 Some very similar but not conspecific forms occur in the Vienna basin. 



Harris mentions the occurrence of a Dreissensia (= Congcria] in the 

 Galveston artesian well, between the levels of two thousand one hundred and 

 twenty-three and two thousand eight hundred and seventy-three feet below 

 the surface. The horizon here is Upper Miocene. 



There are no species of Septifer determined from the Tertiary rocks of 

 eastern North America, but, as elsewhere noted, Cooper has described a 

 species from the California!! Tertiary. 



FAMILY JULIID^E. 



{Prasinidce, p. 529.) 



This family has not been hitherto represented in the faunal lists of 

 American mollusks, recent or fossil, except through the inclusion of forms 

 such as Phaseolicama and certain Paleozoic fossils, which in all probability 

 belong elsewhere. Semper showed many years ago that the typical genus, 

 Prasina, was suspiciously close to the older genus, Julia, of Gould. Fischer, 

 in his manual, unites them as subdivisions of one genus. They are really 

 identical, and the consolidated genus must take the older name of Gould 

 and Prasina be relegated to synonymy, according to the rules of nomencla- 

 ture. To Prasina and Julia Cossmann has added a shell from the Parisian 

 Eocene, named by him Anomalomya, and Fischer has suggested that Bert/ic- 

 linia Crosse may perhaps find a place in the same vicinity. 



Genus JULIA Gould. 

 folia Gould, Proc. Bost. Soc. Nat. Hist., viii., p. 284, Feb., 1862; Otia, Conch., p. 241, 



1862. Type./, exquisita Gould, /. c. 

 Prasina Deshayes, Cat. Moll. Isle de Reunion, p. 25, 1863. Type /'. borbonica Desh., 



op. cit., p. 29, pi. iv., figs. 4-8. 

 Prasinia Cossmann, Cat. 111. Eoc. Paris, p. 174, 1887. 



Fischer (Man., p. 950) separates Prasina from Julia on the ground that 

 the latter is nacreous and has the borders finely crenulated, but both these 



