22 Bulletin 24 60 



CHANGE IN SPECIFIC NAMES 



In the course of this work the following Miocene shells have 

 been found to be preoccupied and for these, new names are here 

 proposed. 



Scala reticulata Martin, 1904, Md. Geol. Survey., p. 214, pi. 

 53. fig. 5, here changed to Scala martiniana new name ; preoccu- 

 pied by Turbo reticulata Solander 1766, Brander's Foss. Hant., 

 p. 17, pi. 1, fig. 27 and referred by Newton 1891 (British Oligo- 

 cene and Eocene Mollusca, p. 213.), to the genus Scala. 



Calliostoma armillatum Tuomey- Holmes, 1856, Pleiocene Fos- 

 sils of South Carolina. , p. 118, pi. 26, fig. 3 ; described as Trochus 

 armillatus. Here changed to Calliostoma tuomeyi new name, pre- 

 occupied by Trochus armillahis Wood, 1828, Supplement to Index 

 Testacologicus, Kiener figures in his Icon., vol. 10, pi. 17, fig. 2, 

 a Calliostoma, as Trochus armillatus Wood. 



Drillia dis tans Conrad, 1862, Proc. Acad. Nat. Sci. Phila., 

 vol. 14, p. 285., preoccupied by Drillia f distans Conrad, i860, 

 Jour. Acad. Nat. Sci. Phila., vol. 4, 2nd series, p. 258, pi. 46, 

 fig. 49, a Cretaceous fossil. I propDse for the Miocene shell, Dril- 

 lia conradiana. new name. 



NOTES ON THE CORRELATION OF CERTAIN 

 MIOCENE BEDS EXPOSED IN THE JAMES 

 RIVER VALLEY 



Finally, I wish to present a few notes on the correlation of 

 certain Miocene beds exposed in the James river valley. The 

 observations upon which these conclusions are based were made 

 this past summer while on the Cornell Geological expedition con- 

 ducted by Professor G. D. Harris. 



The geology of the Coastal Plain of Virginia is well treated 

 by Professor W. B. Clark and B. h. Miller in their report on The 

 Physiography and Geology of the Coastal Plain Province of Vir- 

 ginia, and published as Bulletin 4 of the Virginia Geological sur- 

 vey. In this report three formational units are recognized in 

 the Miocene series, namely the Calvert, St Mary's and the York- 



