FREE INSTITUTE OF SCIENCE 



627 



TERTIARY FAUNA OF FLORIDA 



more than once, and in this connection the A. ovata and complanata should 

 be examined. 



Another species which seems distinct is represented in the collection by 

 a number of young valves from the Oligocene of Bowden. 



Section Granoarca Conrad. 



Barbatia (G-ranoarca) propatula Conrad. 



Area propatula Conr., Proc. Acad. Nat. Sci. Phila., i., p. 323, Dec, 1843; Fos. Med. 



Tert., p. 61, pi. 32, fig. I, Jan., 1845. 

 Area hians Tuomey and Holmes, Pleioc. Fos. S. Car., p. 34, pi. 14, figs. 4, 5, 1855, not 



of Bronn, 1842, or Reeve, 1844. 

 Granoarca propatula Conr., Proc. Acad. Nat. Sci. Phila. for 1862, p. 580, 1863. 



Miocene of Virginia, on the James River below City Point, Petersburg, 

 and on the Ware River, Gloucester County, Conrad, Tuomey, and Ruffin ; 

 Darlington, South Carolina, Burns; Sumter District, South Carolina, Tuomey. 



The differences separating Conrad's shell from Tuomey's are merely 

 individual mutations. The section was established by Conrad on account of 

 the granular breaking up of the distal teeth, a feature of little systematic 

 value. It may be retained, if at all, for Barbatias of elongate form, mesially 

 compressed, with coarse even ribbing, not reticulated, and a very narrow 

 byssal gape. Area protracta Rogers (Trans. Am. Phil. Soc, v., p. 332, 1835, 

 and vi., pi. 26, fig. 5, 1839) from the Miocene of Prince George County, Vir- 

 ginia, probably belongs to the same section, but I have not seen a specimen. 

 This must not be confounded with Area protracta Conr. from the Vicksburgian 

 described in 1848, which is a typical Area and will take the name of Area 

 subprotracta Heilprin. Hon. T. H. Aldrich reports it from the Eocene. 



A. protracta Rogers is figured as having quite regular and rather small 

 teeth, which may be partly due to the influence of age, the type having been 

 evidently a very old specimen. It seems to be rare, and I have never been 

 able to examine a specimen. . . 



Barbatia (Granoarca) virginiae Wagner. 

 Plate 32, Figure 23. 

 Area Virginia? W. Wagner, Trans. Wagner Inst., v., pi. i, fig. 3; Bronn, Index Pal. 

 Nomencl., p. 99, 1848 ; Syst., p. 283, 1849. 



Miocene of Virginia; Wagner (Nansemond River?). 



The founder of the Wagner Institute, Professor William Wagner, in the 



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